Malicious PDF — malware analysis report

Static analysis result for SHA-256 001fbbef0f59c299…

MALICIOUS

PDF

72.1 KB Created: 2020-12-17 09:29:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c503eae3df434f63a1188d9299fd85ec SHA-1: 754af522aa4b35cd2d9566bdf64a60cde6eacd14 SHA-256: 001fbbef0f59c2994a2fa6c9739ff9e6fe9d4ee4326dcf4c3b01b7cb087562f9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, a common tactic for SEO farms or phishing campaigns. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs suggest it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=what+does+bet+stand+for+on+snapchat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420927/normal_5fb2d1cbcd243.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/3859999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5fda5a138b69e.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/gezetega/tekamev.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/29131108839.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/73090686430.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/polaroid_onestep_2_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/accouplement_moteur_pompe_hydraulique.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/anime_fighting_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/curriculum_mapping_example.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/5e_list_of_simple_weapons.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DE 5104 bytes
SHA-256: 792611892c669915b7652d9f1d78f63a40922b9d0692e01216c1b0cbd88481c6
font_01_sfnt_off0000e22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 10404 bytes
SHA-256: cc9c0651a6b5ff8f83b66a7ef8d7184011e6eed536e1a7b21c7ffde81c7b0784
font_02_sfnt_off000105d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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