Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bb41cbe76855e4…

MALICIOUS

PDF

87.0 KB Created: 2020-12-05 14:23:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a13ab31262a80dda21785f73793ee65d SHA-1: dbdb83f4ac9fdcdaa8bdd04f1b1149d98f7d7ed7 SHA-256: 24bb41cbe76855e40bf0700ee6fd02ae0bc8f8674177a4702ae5858b5b36428a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafficel.ru/123?utm_term=diablo+3+season+17+wizard+leveling+guide PDF link annotation
    • https://lutenowunag.weebly.com/uploads/1/3/4/6/134627800/zurilifiwutul-selapikuso-jises.pdfIn PDF document text
    • https://wumunelopilum.weebly.com/uploads/1/3/4/3/134395902/gotekifopigikasuk.pdfIn PDF document text
    • https://wumefabifu.weebly.com/uploads/1/3/4/8/134888429/2e6633c248.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_5fcb4fde1befb.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/galanurupod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc110906609fd0ee7923de0/t/5fc67dcc9d793648406dd71b/1606843853734/64108565079.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c2dc1452f90b7ff143cf/t/5fc70e18a3696915e21bfbaa/1606880792506/mastermind_game_app_2_player.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/terutevirukukofodetaxiw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf56ca9d79364840852abb/1606375115489/uni-t_ut210e_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e6f62bbd74065813a7ba/t/5fc7b3f89dfc2a40452994d8/1606923257076/futikamopapet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fc14e193c6ccf69f38e7577/1606503968373/kindle_fire_repair.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fc0f20a9b1ed03538fd91f8/1606480395281/brummana_high_school_jobs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe19e51972c46e3c677e26/1606293990676/used_dog_box_for_sale_in_ga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7ac403f5353fd956fc5/t/5fc559cf3485235c86790b5b/1606769104870/sadezevekan.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 5628 bytes
SHA-256: ae148ab90fd685a14d2d79c029fb7ab2074ee0ba52971daee85f7048822a47b4
font_01_sfnt_off00011f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F19 15300 bytes
SHA-256: de2505e91e1f7ddb2f0317ef6c70695cdb3462c138cf59b573a1960e0d1420d5

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