Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67fbe70df22d8bb…

MALICIOUS

PDF

75.2 KB Created: 2021-02-23 19:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 32cc24950c25ea3161381d01d097dd70 SHA-1: 26da4532ddfde75e8eb46440fe5caeb397cb54d5 SHA-256: e67fbe70df22d8bbbc378d0665247ad85ac8667f6e63dbdee5d357e5538deb98
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of an SEO link farm, suggesting a malicious intent to manipulate search rankings or redirect users to potentially harmful sites. The ClamAV detection and ML classifier strongly indicate malicious content, likely phishing or a trojan. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to distribute further payloads or phish users.

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://bologen.ru/123?utm_term=seiko+solar+chronograph+v175+battery+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445129/normal_603265d281886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5fda65b561bfd.pdfIn PDF document text
    • https://voropulunonuz.weebly.com/uploads/1/3/5/3/135316946/8108727.pdfIn PDF document text
    • https://fepepifufom.weebly.com/uploads/1/3/1/8/131872298/9610830.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/Bgdhbid/zombies_2_movie_songs_lyrics.pdfIn PDF document text
    • http://potobol.22web.org/cricket_australia_logo.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/09hfgcJ/rotten_tomatoes_hillbilly_elegy.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/thg8Gkd/kung_fu_panda_2_netflix_canada.pdfIn PDF document text
    • https://latoratepowubum.weebly.com/uploads/1/3/4/7/134713938/86be7180a1.pdfIn PDF document text
    • http://taroburi.iblogger.org/47646360704.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/cPjchUb/iki_kisilik_oyunlar_ates_ve_su_friv.pdfIn PDF document text
    • https://woxufojobufuv.weebly.com/uploads/1/3/0/7/130739326/5399146.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/tajimipojimo/906933955.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/free_online_cv_builder_and.pdfIn PDF document text
    • http://giwofigu.epizy.com/39057988087.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/sarubopudalagegapum.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/dikujiteberuwilar.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/81184266656.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_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 6072 bytes
SHA-256: e40b27e5a0f273f4be6b42555b592fe8d020d992f699a7f8eb6edf7ca8f64db5
font_01_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 11328 bytes
SHA-256: 20427745ef104d2d98911913b149ea92057534f9fd8e7259278a205a2edd6cbe

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