Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0e409da0b1e88e…

MALICIOUS

PDF

79.7 KB Created: 2021-03-15 06:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b12e8554820fe66b9780598900ab7afb SHA-1: e916b80105d085614722eddd901df764e7e846c7 SHA-256: af0e409da0b1e88e6c333b9039f63fc571697ea62e375289d538e0133fdf81bd
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • 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/strik?utm_term=can+you+use+regular+trash+bags+in+a+diaper+genie PDF link annotation
    • http://wofoweniwer.iblogger.org/tixajux.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/cFPhgKs/raid_bosses_november_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_5fe65f01dda66.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/nenusofotam.pdfIn PDF document text
    • https://jebilazi.weebly.com/uploads/1/3/1/8/131856389/e31d380c05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_60135e525781a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_60110ac53e0e9.pdfIn PDF document text
    • https://cdn.sqhk.co/jibibezeva/bwhdjgH/dufefuwepaxozarubusafem.pdfIn PDF document text
    • https://dijovenop.weebly.com/uploads/1/3/4/7/134705939/dereba_jaxejami.pdfIn PDF document text
    • https://redelonoxoti.weebly.com/uploads/1/3/1/6/131606094/likag_wasoburudel.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/gdGUUge/prop_hunt_code_arcade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495855/normal_5feff862c709c.pdfIn PDF document text
    • https://gazufapojekivu.weebly.com/uploads/1/3/4/8/134890592/rogafevokuvijosazike.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/q319jgj/telstra_recharge_apple_pay.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/jigfjb5/lep_s_world_2_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427287/normal_602a1ba0a0ba9.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/3071491642.pdfIn PDF document text
    • https://wumezovavupod.weebly.com/uploads/1/3/4/7/134741594/758255.pdfIn PDF document text
    • http://gamiwajete.22web.org/audel_hvac_fundamentals_volume_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_53aa45032a1447c290bd94ee2e718317.pdf?index=trueIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_0d8756b03c4e446bbab0fedb9cfa6f0d.pdf?index=trueIn PDF document text
    • http://kotopogo.rf.gd/buell_xb12s_performance_parts.pdfIn PDF document text
    • http://gafodix.myartsonline.com/93966691173.pdfIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/bonezobakotisasew.pdfIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_606dc5737539474086fe5ff0a85c2acc.pdf?index=trueIn 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_off0000f913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 5368 bytes
SHA-256: 2e8660e679a3d38fa135801cc7723beccb4c2d85f48bce4414df38f7243b4796
font_01_sfnt_off00010b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B45 11100 bytes
SHA-256: a97acddab5c07f745b78d4df45284302ec44ae7cd56ffcd6c0826ce1f5482922