Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e74f2c84ef8d38…

MALICIOUS

PDF

75.6 KB Created: 2021-02-21 17:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6ba8e2101184ff71e915a8d854f2e8f0 SHA-1: 0f148a93e3213515554bb575c234221bc277ff74 SHA-256: a9e74f2c84ef8d38401ed7c138b8c8d6d55f8c385b12adbd3573a6ab714a1ba7
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, which is a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jacksth.ru/123?utm_term=gdp+is+not+the+same+concept+as+disposable+income PDF link annotation
    • https://cdn.sqhk.co/pixefavenar/hgB9jdl/shooting_in_kings_manor_kingwood_tx.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/jigedopekuful.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/hjjew4T/sibudisuferugugeluzojilu.pdfIn PDF document text
    • https://winojarenegesut.weebly.com/uploads/1/3/4/4/134481716/takotefi.pdfIn PDF document text
    • http://fitness1.space/ruvotunejekaxawevewitsu2a9.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/lozolix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nuselufuzo/mordegon_second_form.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/werijupewexo.pdfIn PDF document text
    • http://suferipuwa.epizy.com/korazifozob.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/eye_has_not_seen_marty_haugen_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/ardaas_karan_full_movie_filmyhit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 5176 bytes
SHA-256: 0c3190a30ce8a4d999d5fd38b1856951e1b67e2a2f22b845569785f1435b8758
font_01_sfnt_off0000eecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 10788 bytes
SHA-256: 656c8d140f62dea6b0ab47bc07514e16bb9888356163a0305b53b6a1321e5158
font_02_sfnt_off000113ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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