Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baa4a1191844184…

MALICIOUS

PDF

111.8 KB Created: 2021-06-10 12:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 107c69660cac575ffea7163b385cdb86 SHA-1: 58c860cd73088fd18abefef95ed190784b3c8310 SHA-256: 1baa4a1191844184b9806a9c2eaa30e37a1af8dbbacdabf902dd79871a71c7d6
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://drafthe.ru/uplcv?utm_term=uniforme+colegio+anibal+fernandez+de+soto PDF link annotation
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/585837f706f562d83aa32a48dd73b589/notetigukejav.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/ludafow.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/rowilukaxuxitovutubinoza.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/vqheildjjv4r2sghv7qp8sisth/35203524515.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4j0v3bb0g1klfgp5o4q3kpmd95/ludebepomufituvabepo.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/97164035694.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/3a1d6f9f6994624d094a363888b888ec/jomaxivuxekuwane.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083ea52af613---wadutiwu.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/6b3f036a7217a9decc95db75bdf4d4f2/dadawejer.pdfIn PDF document text
    • https://papiratisk.cz/soubory/jetagevunuseves.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885299f11f9---tosejolomomifuzilag.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/9208326333.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/78b4ebcb6c59befd1da7249ed7e9fdb7/nerojuzolusuguronoz.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/db205517f9b33c02896b36f62788514c/40613757794.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/ridazomoxesupimat.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d4759a362---lumowim.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8001f53dff---noxukaxamusisanun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16870 3968 bytes
SHA-256: f65fc218e6689d881dad4dd63401ebf7223ab77140cd9842b38b7ac2f6dccb44
font_01_sfnt_off00017685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17685 5520 bytes
SHA-256: 6c0f7dd8b2a6c8fa09c714d9de6ba3322a72313b8afa9a3aa161ee6ea094be8a
font_02_sfnt_off0001893c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1893C 12240 bytes
SHA-256: e2b6daf5ba54457be2ffc76074aa34154abbdb3c1afbeb1656124511635f9b82