Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5dc8ab66f4958a0…

MALICIOUS

PDF

128.6 KB Created: 2021-03-15 15:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f836e030321c24175b910bca4245ad42 SHA-1: 12aad679a87e1de286db506afd677f3b7b6b471c SHA-256: c5dc8ab66f4958a08af14b5a25a6d5cf8c1a4b03143be5ad738f5e9c6aad69d0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure and an urgency-based lure. 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 0.9999

Heuristics 7

  • 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.
  • 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
  • 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://mezovuduw.ru/123?utm_term=account+now+app+for+android+phone PDF link annotation
    • http://nepufikusugepa.iblogger.org/visajutide.pdfIn PDF document text
    • http://lufirisor.iblogger.org/42911364994.pdfIn PDF document text
    • http://kosalevibox.22web.org/88021652181.pdfIn PDF document text
    • http://podemufibe.iblogger.org/archero_guide_holy_touch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobaziw/xazinikuvedatuwoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/lirotasidetenito.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/estadistica_descriptiva_gratis.pdfIn PDF document text
    • http://vujomigokije.rf.gd/an_imperial_affliction_full_book_free.pdfIn PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_acfc38cf465b4713b1e4355962b7fffd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitatotol/dogozonafe.pdfIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_95f2d78f5029475ca1b4ac70b3597715.pdf?index=trueIn PDF document text
    • http://nuxejoxulagub.rf.gd/94469358746.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/sagittarius_man_and_cancer_woman_yahoo_answers.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_45b02e2de0ef4bf5a3e9fa76c9918cc8.pdf?index=trueIn PDF document text
    • http://mosuzuxogobet.epizy.com/dream_interpretation_dead_grandfather_funeral.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/free_alphabet_printable_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/avast_gratis_per_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/nazeg.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_off0001bcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCFA 5116 bytes
SHA-256: 1abeca268383e21c0e5cd58d06a458fdaebbeaf91d9170e34af80b674f9585a6
font_01_sfnt_off0001ce72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE72 11568 bytes
SHA-256: f1dfff27f7a00b0d6eef2b899f64b3df6adae512eec3669058847fab4dab853a

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