Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ade533b81fdfbb…

MALICIOUS

PDF

70.9 KB Created: 2021-04-04 04:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 91bed179b72512fc5503c2f0be79d518 SHA-1: 82052fb3eb8aaa809de7156210f33ac2014fb6df SHA-256: 43ade533b81fdfbbfefc4cc172207cbb58096aa1b5f713c8a20dd449ec9758e3
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=wylie+youth+soccer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483338/normal_6031f8c935798.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/ieiaWhi/grand_vegas_mafia_crime_mod_apk_download.pdfIn PDF document text
    • http://differencecheats.net/woxuxasiwopedibivaxabagiyxyv.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/5214091836m6m7g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_604f51a3df447.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/risk_assessment_and_vulnerability_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/KdieifD/97485761843.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/tcejax3/retro_collection_darth_vader.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_5fd60b7695948.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/kudekakefolomuxirazid.pdfIn PDF document text
    • https://cdn.sqhk.co/bavisimupux/hhji1gf/64108477840.pdfIn PDF document text
    • http://ladirojenovezoj.mygamesonline.org/joxosaraponivapaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/kizajituxab/Chcgcih/army_hipaa_training_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_04f306c9b6754701b22deedb2f664538.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genijusemu/channel_2_news_reporters_atlanta.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_65db13bdfc564ec19efc7e35ee5bfb61.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/ninja_professional_blender_1100_attachments.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_ad69d5ac28054aa682ae18afafcba85c.pdf?index=trueIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_878acbe60f244fa0be0826bc56b24572.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/sujigunebuwifuti.pdfIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_04f76dd5ba42482ba0736f53426b3eba.pdf?index=trueIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/axumite_civilization.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E0 4792 bytes
SHA-256: 74e09125881aedc887b0dff19308f7a9f412061231779aeca35da4990a28ae7c
font_01_sfnt_off0000e93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 11004 bytes
SHA-256: 5b007e985bc61c6669273e595c8cd27a6c5c707b4bbe4f55b83f175dc842a586

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