Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b05920a49eb752…

MALICIOUS

PDF

71.1 KB Created: 2021-02-23 08:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 68f711029491b2701b82fe8ee03ceb85 SHA-1: 5a0bf9f2c5a56929838124202334c278bc10c7f0 SHA-256: f2b05920a49eb752ab7fefca1a4408bfc73d4e5be152dd663700454f95318c30
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external links, including one disguised as a search result for 'how to open a samsung ce0168', likely intended to redirect users to malicious sites. The PDF also exhibits characteristics of a link farm, with many embedded URLs pointing to potentially harmful content.

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/wb?keyword=how%20to%20open%20a%20samsung%20ce0168 PDF link annotation
    • https://cdn.sqhk.co/wuvevalor/chhvX2f/movie_theaters_calgary_crowfoot_crossing.pdfIn PDF document text
    • http://nibelv.xyz/what_is_legal_but_unethical_examplesnixst.pdfIn PDF document text
    • http://good-production9.site/mod_among_us_always_imposterg7w34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411229/normal_5fd9d216d9d83.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/b1giij6/72445095480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480402/normal_60338680bd846.pdfIn PDF document text
    • https://basapozixuw.weebly.com/uploads/1/3/4/7/134701575/1151752.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/igifqje/dead_trigger_2_android_online_atau_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/Mieihk9/best_electrical_conduit_bending_app.pdfIn PDF document text
    • http://hdsamara.ru/how_to_replace_brother_hl-l2380dw_toner58f6y.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/gatazeromij/mikitavonugotivetejidiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/50225743336.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/38100519040.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/top_50_movie_s_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/aisi_4130_mechanical_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/88116699051.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_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 5720 bytes
SHA-256: 3a76c2936e6f17968ad02df490749845a8b03b78493e4f5501598bcf78b70af5
font_01_sfnt_off0000eb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0F 10620 bytes
SHA-256: 226c6cb45407b57a28c826e813849b3655ad517660f1c72624d717e2bb2b5bb3

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