Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6ccb8879e0d552…

MALICIOUS

PDF

84.2 KB Created: 2021-04-01 15:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a96ab51bbfb5801f2ed70970dc5556ab SHA-1: 82c00726aea2198e24f0f8de2e06fb7b24ae3f5c SHA-256: 2c6ccb8879e0d552afab9501c3e3ad51c2a8ec890d372d6e3fdef9ecaf148d79
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm pointing to various PDF files. One of the primary URLs, 'https://bologen.ru/wix?keyword=final+fantasy+ix+official+guide+pdf', suggests a lure to disguise malicious intent. ClamAV and ML classifiers strongly indicate this PDF is malicious, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=final+fantasy+ix+official+guide+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410004/normal_6001dead586bc.pdfIn PDF document text
    • http://zapezotibino.22web.org/renewable_energy_sources_mcq.pdfIn PDF document text
    • https://gefaturulabi.weebly.com/uploads/1/3/4/4/134487578/luvakatekix-vidivinujeje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420917/normal_6061a20cde074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459470/normal_5fe13cd680efd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_60349a7e8a840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467560/normal_60121b4ca7342.pdfIn PDF document text
    • https://ludilejufa.weebly.com/uploads/1/3/5/3/135347725/3055358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421329/normal_6043256baf119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407314/normal_603e3a9469a1e.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/xozeb/beloved_script_free_font.pdfIn PDF document text
    • http://pobediwawe.epizy.com/dakudowagug.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/91033680343.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/halloween_worksheets_for_8th_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/free_fractions_worksheets_year_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/coulson_and_richardson_volume_6.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/vibunixamimonov.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/statistics_and_probability_grade_11_answer_key.pdfIn PDF document text
    • http://vikipabolukizi.rf.gd/exercises_wh_questions_present_simple.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/arya_telugu_movie_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/87671685738.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_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 5232 bytes
SHA-256: 555a94c4ea2c74c40b754b8fdd75d30b193055beaa143ce9a4b0a16b3e309e5c
font_01_sfnt_off00010feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEB 11056 bytes
SHA-256: 41aedadd57dbe33876f7e2e9aff1eb06bfc9c0c094b37da4a810d6d6aba4838f
font_02_sfnt_off0001358d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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