Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cd06ba9cfd7dfe…

MALICIOUS

PDF

96.4 KB Created: 2021-09-17 23:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eaa361145657b8cdc0da0f021232f2ae SHA-1: ff301d60b028985eedb97a9de433155c7ebc769c SHA-256: e0cd06ba9cfd7dfeb3c9b7453308e0c4151bfcb758cb559c650b6271303a176c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external sites, with many identified as part of a link farm. ClamAV and ML classifiers flagged this PDF as malicious, indicating a phishing or malware distribution intent. While no scripts were explicitly extracted, the structure and heuristic firings suggest the PDF is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://actorconseil.com/files/file/vufaxuwijirowidigidufida.pdf In PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/22619612201.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/rumiwekavulovododozu.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/22611221786.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/lavezijolomu.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210901141218_797mnz.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/xolijomifatudijefijej.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/88876278142.pdfIn PDF document text
    • https://12tiga.com/contents/files/puwoxegavisev.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/78110292001.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/29193659210.pdfIn PDF document text
    • http://ausafe.net/images/art/files/zawexagatimulizu.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/binete.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/lasiwuxurenozat.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/73315841878.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/76859099184.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/vifateramimexifugajo.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/sopuvumuz.pdfIn PDF document text
    • http://dogwarts.ru/sites/default/files/file/77363084713.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/42304894028.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/70037940094.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/wegex.pdfIn PDF document text
    • https://cardolf.ro/files/fatusuxazifesexisoxuros.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=calibre+tablette+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A8 21608 bytes
SHA-256: 804af1068466fb5126f99c200f88d249e6eeb76959c73445e391506917cfae90
font_02_sfnt_off00015cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CC8 10244 bytes
SHA-256: ae2da116ee0c11c44ab61527cefcfebdc208cdd3323a4820fc37d3f804f181f7

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