Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98329a1c3ac5030…

MALICIOUS

PDF

70.6 KB Created: 2020-12-26 06:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7f1bc23091d0d8d4922469eaa078f133 SHA-1: b6ebdf107cb83f8f4fcd56b1f8ec4a6b7e20709c SHA-256: d98329a1c3ac5030524385c1d3756e43efd0ee8b5a1f6b09ba03d9b93fb80e1b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing or malware distribution tactics.

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 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://traffine.ru/strik?utm_term=lyrics+i+remember+mama+live+shirley+caesar PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389365/normal_5fe46c7ad5a2d.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/6291139.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/c7f721eff6e7.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/hfsghie/77842945297.pdfIn PDF document text
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/283e6d5641f.pdfIn PDF document text
    • https://cdn.sqhk.co/ponigubik/hhhhSyT/62202264393.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/2796375.pdfIn PDF document text
    • https://rodibafabe.weebly.com/uploads/1/3/0/7/130738722/mofesikomelamivu.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/jggd4WB/wasegoxefivi.pdfIn PDF document text
    • https://tulebowad.weebly.com/uploads/1/3/4/4/134467329/975de3b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/303d0606-c2c1-410b-8b56-8343a43ce4ce/pupufatuwaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f54aa4-93fc-4469-8cc5-3e804ac471c6/femiruk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC361 5284 bytes
SHA-256: a32575d97e0647518c2cf3687eebdde8d1497332cb5c8757e03717c3f54035fd
font_01_sfnt_off0000d53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53C 10072 bytes
SHA-256: d9b159c1af13b94f0875fdb89eedfce1ea0b642c630511a6b5bcdc7aaa0eb08a
font_02_sfnt_off0000f803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF803 16160 bytes
SHA-256: 71fec8a3adfe41455811528c654ef740a0d97889ddd19e39e153b04b7507b7f0

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