Malicious PDF — malware analysis report

Static analysis result for SHA-256 c982c3735b1e69db…

MALICIOUS

PDF

80.9 KB Created: 2021-02-21 10:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8ba625e62f200973e7802112de8167b3 SHA-1: 17695154626307be44bad73549e2f67b71382122 SHA-256: c982c3735b1e69dbf2c49c7838809fe347426edb540e29b4b6c7005057b03a79
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to file compression. The presence of multiple PDF link farm heuristics and ClamAV detection strongly supports a malicious classification. No scripts were extracted, but the document's structure and URL distribution are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://druttle.ru/strik?utm_term=como+hacer+un+archivo+comprimido+mas+peque%25C3%25B1o PDF link annotation
    • https://cdn.sqhk.co/sunidoxil/jgjcjdu/puwawuluwagizij.pdfIn PDF document text
    • http://jumbochecker.com/80981536301x36f4.pdfIn PDF document text
    • https://zonilalafujagep.weebly.com/uploads/1/3/4/7/134731182/3710753.pdfIn PDF document text
    • http://glasshookahcatering.com/34055073341czf29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_600dca6dbab90.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/jEugh48/4718989693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_602ac5ce0faa8.pdfIn PDF document text
    • https://nutovavodus.weebly.com/uploads/1/3/4/0/134012609/4716452.pdfIn PDF document text
    • https://tovibebifenoge.weebly.com/uploads/1/3/2/6/132695438/4256579.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/ieijKmo/moderna_vaccine_update.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/jehdcMf/rainbow_holographic_potions_master_mixer_decal_set.pdfIn PDF document text
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/4341ca14a0e.pdfIn PDF document text
    • https://zemotererozo.weebly.com/uploads/1/3/0/7/130738962/ecf561.pdfIn PDF document text
    • http://whitecheat.xyz/please_install_sqlite3_package_manually_node4f68a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478378/normal_5feaf7c1b12dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426262/normal_5ffb144f19819.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/gurafoga/uon_assignment_cover_sheet_word.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/62288591863.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_off0000fb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8B 5584 bytes
SHA-256: 1766f13f09db87df424acf1fe16ac081803cc5cd260effa1d3104e853fae3b7a
font_01_sfnt_off00010e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1E 11808 bytes
SHA-256: 39dddaae074746e4dfad19cf9c271fd8b33d4557bfeb6adc5330fb8436496f80

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