Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa33f748cffbe7ef…

MALICIOUS

PDF

88.3 KB Created: 2021-07-01 21:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7ba46e8ed9727be0a8d5025c253e77f2 SHA-1: d5bf1d6473e7305da9227f5e3256ab5c27c2361d SHA-256: aa33f748cffbe7ef328f5be64461e41b921679c847ff5626215749c1201a8be4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce519326838---54912402937.pdf In PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/q7h4haboumf3ra5k937udfbnn2/87801623841.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b27a669c925---57254187432.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/pivodoledadogum.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/09d8a4d86d101446e6475a2d8ee19f2d/jixobifixemu.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b614895e179dde05b9d77b2459db7677/kofose.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/84075333508.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b8f00cda3e13b374c40adee1615c507/92380858406.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d3b073ea7---14065630006.pdfPDF link annotation
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/5k53bg8d3jim5oa3tnl8l7k3r5/95465605290.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/cc68c69ba4e2b6fb06c1cea1b3e34bc2/46252707595.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/d71619a7d6346bd982e3809008dfab0e/96319884454.pdfIn PDF document text
    • https://led7.ru/file/32048101676.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/xatadegorowos.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160768c080e9db---disemukowexukewotoxo.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b220d308f---wedolisakadanozolowu.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/d47e8364f6b94e9fd0a55cb66a0bf498/nenivetafiton.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/jagonimidaxo.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/25adc6e2cb6f4b99d6ed97760cf96c20/gejabozerilumexikotozapa.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/14c102983ef2feb4274f8cff2960940e/jamotumuz.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/8vbn5na7nc39pv271p4qub3bq0/39336504397.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/zazijoxozikatudolo.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfb1964765---porikinarel.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/58825895729.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7808c4189---13591302657.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/dd2704104b6402b8b0a61bb805e51ed2/36663208779.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=adjectives+with+ly+suffixPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 18528 bytes
SHA-256: 69715edc7ba133a89556a0304f2f2cec89456bb7e50ea71a19efe84ff52228a7
font_02_sfnt_off000139c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C5 10668 bytes
SHA-256: 5151d5e4efc1170a9cd3ed2c93aa3b69580efe106a4ef5531e9802a9506ec405

Open this report in the interactive analyzer, or submit your own file for analysis.