Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfa0eaab184a535…

MALICIOUS

PDF

81.7 KB Created: 2021-03-22 00:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f22e56e328f1a7a1cad6ff66bc98ed9f SHA-1: b1e234d480b7a92e602e72c70233d02935f7d1a3 SHA-256: 6dfa0eaab184a5354b335ec9140493754b982cf93f5e778145ebc9d4f3be5361
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/award?keyword=confucianism+and+taoism+pdf PDF link annotation
    • http://gewusoluxul.scienceontheweb.net/74185339605.pdfIn PDF document text
    • https://cdn.sqhk.co/xafigozenusu/ifjeaI4/foxy_and_mangle_wallpapers_backgrounds.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/hjCgiif/61133395977.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/teori_akuntansi_dasar.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/iibsjap/12891096432.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/geriajc/tazubazuruwulonukusetuf.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/little_house_on_the_prairie_cast_where_are_they_now_youtube.pdfIn PDF document text
    • http://gozimudowojuzun.mypressonline.com/81530680557.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/encyclopedia_of_general_science_downloadgzy0z.pdfIn PDF document text
    • https://cdn.sqhk.co/lawikuto/ajbm5ie/learn_python_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/vabadoma/ge3jeGJ/ultimate_photo_mixer_app_free_download.pdfIn PDF document text
    • http://kobazugipodiv.medianewsonline.com/80233985919.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/kadirudocv2yo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vilumepidiwego.myartsonline.com/giwokibomibifikogud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1808f208-5b74-4d11-9d52-58cb283b2927/sowedix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd22c05-8a62-4b3c-b2c4-e03d73838f1d/american_gods_season_2_episode_3.pdfIn PDF document text
    • http://bigapenegig.atwebpages.com/3296764410.pdfIn 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_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 5072 bytes
SHA-256: 8bc0a498ea5eac39f71f7932420622b4b5234f8484b2858761eb6a62ae3225b6
font_01_sfnt_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 5080 bytes
SHA-256: 9eca1645f43d40581d4861b9a75d2b784e2a7bd201251147e41d0779a8e0aafd
font_02_sfnt_off000113c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C9 11348 bytes
SHA-256: ecaab9e86d093aeba839b3e6a4b791eaa042c281dde9b2cefdabf477cc9d9633

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