Malicious PDF — malware analysis report

Static analysis result for SHA-256 141ef19d7e6c2f89…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 06:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3a718a4c4d20d5faa2301923723a91b8 SHA-1: 2648ea058d41e1143f8eb7e52ce8943fc70c7f8b SHA-256: 141ef19d7e6c2f89ebeb2c97f57036a5e4a652a8bf598fc2fadd06c957a98938
162 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to certificates and deadlines, aligning with urgency lures common in phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://lozipotod.ru/award?keyword=asbestos+awareness+certificate+pdf PDF link annotation
    • http://nadefememidep.medianewsonline.com/divid.pdfIn PDF document text
    • https://cdn.sqhk.co/xagogudexo/ggGfJid/mulop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495264/normal_605993581a883.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/gcfsHih/84297854911.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/hashimoto_diet_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/kFFBBjj/pinball_arcade_museum_st_petersburg_florida.pdfIn PDF document text
    • http://fopekoriw.sportsontheweb.net/honeywell_portable_wireless_doorbell_not_working.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/cracking_the_dream_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_603f8b2becd81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392867/normal_6002f01a290e7.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/X6dNdhd/pamijajuvof.pdfIn PDF document text
    • http://bexixibeguben.sportsontheweb.net/how_to_determine_trailer_axle_weight_capacity.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/52838913322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386080/normal_5fdfcb2262f03.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/a4Jjkx7/word_crossy_level_1572.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379611/normal_5ff30af171cad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/99957185852.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/5274826068.pdfIn PDF document text
    • http://zupugininifas.epizy.com/72318347651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d638411-c46a-4f09-8a12-3d2da7cdb907/best_word_puzzle_games_iphone.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/jipukapamoka.pdfIn PDF document text
    • http://woxanegerofokox.rf.gd/sejutonetigodaxi.pdfIn PDF document text
    • http://bexudogi.rf.gd/tintin_2_tamil_dubbed_movie_download_in_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d66745e-c0df-4d6e-bd50-c61a61539a15/55458827627.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_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 5336 bytes
SHA-256: 0e27e2351ae0aac97e7394eb3b31b9d8dc49f2c7922791068c4bed5a235b08f1
font_01_sfnt_off00010495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10495 10896 bytes
SHA-256: 50b4be8f9c6cce91a40bfacfe8e2862247b399b17761f40b6191fc57be8d9260

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