Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e21e99a848ce28d…

MALICIOUS

PDF

81.4 KB Created: 2021-02-09 13:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 615b3f4dbcd3aee64bec48330842a65c SHA-1: 353396564d275adf0804a142e31b8a533825c2e5 SHA-256: 0e21e99a848ce28d6b4a4700de7d3691a9d935e0110113a51a149478aac354b1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://seumenha.ru/123?utm_term=black+skin+white+masks+richard+philcox+pdf', suggests a lure to a site potentially distributing malware or engaging in phishing. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', reinforcing its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=black+skin+white+masks+richard+philcox+pdf PDF link annotation
    • https://cdn.sqhk.co/bugininaxi/iiJgehd/milkchoco_hack_mod_apk_2020.pdfIn PDF document text
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/luwidipuredulinezegu.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/N9lsOhf/62264946577.pdfIn PDF document text
    • http://honbiz.pro/fagowomiperexowikozomukepstn0.pdfIn PDF document text
    • http://gedawirij.66ghz.com/grossman_cardiac_catheterization_8th_edition.pdfIn PDF document text
    • http://cupe1.ru/36821501569siwao.pdfIn PDF document text
    • http://metazoaapc.fun/lion_s_pride_inn_sheet_musicn1hxo.pdfIn PDF document text
    • http://reduslim-officialsite.site/wuxafuuf4so.pdfIn PDF document text
    • https://kasutuwisuruja.weebly.com/uploads/1/3/1/8/131872017/2452039.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/dabatisew/21967455726.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/cours_d_allemand_pour_dbutant.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/pomonarowerup.pdfIn PDF document text
    • http://gijabakupukuj.rf.gd/deadly_betrayal_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/2014_hollywood_movies_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/putapagilanakowofi.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_off0000e769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 7048 bytes
SHA-256: d3fc74a66c5872e3b7797e86f94ac0be815fb2f3ac647abd726374d07004b355
font_01_sfnt_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 5668 bytes
SHA-256: 44fc5ed1a29b4131acf8d03e8fe9cfa09d0d4cd6dbd961c17375a404ec3509d3
font_02_sfnt_off00011249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11249 11236 bytes
SHA-256: d35e6ed5c7eb733ccf042b3abb6b1bb3491b6bace34c1ada7d7e6138bb26adae

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