Malicious PDF — malware analysis report

Static analysis result for SHA-256 7012aa837e9cdc52…

MALICIOUS

PDF

81.1 KB Created: 2021-07-24 07:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e322fe686d8fcf543bf43860955c1353 SHA-1: af5a58fe3107cef80320c198a14f2cd18b3a8467 SHA-256: 7012aa837e9cdc52fef1220c4a1c23dd3b1f41d3f8249ea5dd7de5b31f8c520c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The document also features numerous links to compromised websites, many of which appear to be part of link farms hosted on disposable or compromised domains, suggesting an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607165aa2bb57---17304751655.pdf In PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/s7jckgjj2mn4h76ltts2e533sq/21279235878.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082d8ed0db7f---baselibiberuz.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/rajidanaxifogido.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/428370df4018045e24be83b9bf41dc19/nawokedurevegamekixatuso.pdfIn PDF document text
    • http://tranindo.com/Uploads/userfiles/files/10494535753.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/qvhete2p5808a36i3id46ooff7/gunokajej.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607372699879b---41155650022.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/40872213360.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/91d17b1658441a5dd31f15e43ddf9af7/punupalimivesixajozeta.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0da9e71552---givegesaduneso.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/68035550919.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/zezuvudojewupasotufuvar.pdfIn PDF document text
    • http://ptsound.com/plugins/ckfinder/userfiles/files/jibofosasagujodorusob.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///potajupafagudisonu.pdfIn PDF document text
    • http://live-net.it/file/37109374432.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/0e89b3b1638fdf64e5a40607dc006559/keduzubunob.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a816489a5---tobiwuwisiforeb.pdfIn PDF document text
    • http://samtle.net/ckupload/files/96444522905.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/faxidavelogozixaruzav.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/losotigukelipadaruzorej.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/lonajitofekimopatazizo.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/02913e71cc2a405207f96dd6fea69349/vikekuxorelusizadivuwigek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=mystic+messenger+email+guide+707+routePDF 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_off0000d668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD668 17396 bytes
SHA-256: 2b5f5c3eec27a8cd93a84ea6e200e446d491e5f3ec2e66f53871a5ca72ac8b31
font_01_sfnt_off000103fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C15 11092 bytes
SHA-256: a2cf686b87dfa29a1c52dcce57ecab341f1781bb4f3791008b7c665516d7c745

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