Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec2936bcca429f8…

MALICIOUS

PDF

74.4 KB Created: 2021-03-30 18:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0a0fee6139c145392000b325980df7e SHA-1: b676f05ce718a24a2d386ab7e3a7785caed1022c SHA-256: aec2936bcca429f8a9c11ece95179ab821a006ea080e9abc3748f4a78bd9843a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://dafemum.ru/wix?keyword=megaman+x+in+sonic+2+unblocked', suggests a lure to potentially malicious or deceptive content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=megaman+x+in+sonic+2+unblocked
    • https://cdn.sqhk.co/bejomewuv/hahgigm/nfl_schedule_week_5_espn.pdf
    • http://meetcabinets.xyz/what_is_chemical_engineering_salary_in_indiayc8fg.pdf
    • http://leree6.club/veropavumomjswq.pdf
    • http://lifegirls.site/the_jungle_upton_sinclair_worksheet_answers2dskf.pdf
    • https://cdn-cms.f-static.net/uploads/4476432/normal_60490711447b2.pdf
    • https://cdn-cms.f-static.net/uploads/4447098/normal_60179dd953d36.pdf
    • https://cdn-cms.f-static.net/uploads/4446035/normal_60209935c42c0.pdf
    • http://skidki-day.store/kazagolerizazive0av9.pdf
    • https://cdn.sqhk.co/zanotunuzi/gApVhc8/present_simple_negative_questions_exercises.pdf
    • https://cdn.sqhk.co/zirevazul/70Ehfsc/20324229289.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/boxujetanonikuv/kuxeduzokuvotepez.pdf
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_0a7c73226cf6492586e98400bd37fda7.pdf?index=true
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_a7d3090cc50d44368f16b22648671d04.pdf?index=true
    • https://s3.amazonaws.com/radubozufiwo/hydrogen_chloride_sds_sheet.pdf
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_0233718ec989450186f17833d35c200e.pdf?index=true
    • https://b6b48848-b4e5-45fa-8615-5078b9c10b0e.filesusr.com/ugd/94e5ef_081f2bfd630d45d89d5a7a795bec5490.pdf?index=true
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_13b4da8dde16492c82fad1bcd1b7b2e6.pdf?index=true
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_caeb1cd4989940499ac72c947aa9348d.pdf?index=true
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_6b1845f9b3fd493fa0d5503c014903cd.pdf?index=true
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_a60d42b146a843d59204ee53175e7a5b.pdf?index=true
    • https://s3.amazonaws.com/satuja/72650420087.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e39b.bin
dfbf18a56a412a6a4e5318addce17c40a36ec230ba055121295c78464113d93d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE39B 5572 bytes
font_01_sfnt_off0000f693.bin
d6dd4356467ee45a60672fad83bd09cf3d0159a85bf41ed0c4803d01e33f00a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF693 11084 bytes

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