Malicious PDF — malware analysis report

Static analysis result for SHA-256 319ea2517316e468…

MALICIOUS

PDF

73.1 KB Created: 2021-05-01 08:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 646ef2ce3a16fc896fcaf6604b97d2a8 SHA-1: e9f9afa1292697314612c96d11325dcbec92f2b5 SHA-256: 319ea2517316e468eef5911f4c78521be14069ed44fa2fb98d106e75801836a1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

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://xezojetit.ru/strik?utm_term=kansas+dust+in+the+wind+tab+letra
    • https://sigajijatikad.weebly.com/uploads/1/3/1/3/131379485/4ca80878b8a.pdf
    • https://cdn.sqhk.co/jegetito/dYYghdg/vets_near_me_payment_plans.pdf
    • https://static.s123-cdn-static.com/uploads/4474988/normal_5fe51d8d6fa2a.pdf
    • https://kenoduzuran.weebly.com/uploads/1/3/5/3/135350653/2329835.pdf
    • https://cdn-cms.f-static.net/uploads/4443344/normal_6050b6dc443d1.pdf
    • https://jizufozerujit.weebly.com/uploads/1/3/4/3/134343201/2467370.pdf
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/rofufinatomum.pdf
    • https://nodejobirutita.weebly.com/uploads/1/3/4/7/134748641/615fb69f.pdf
    • https://xibimitavidin.weebly.com/uploads/1/3/1/8/131871740/4244270.pdf
    • https://cdn-cms.f-static.net/uploads/4369626/normal_6051ec8f42fc4.pdf
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/e15265c5a.pdf
    • https://cdn-cms.f-static.net/uploads/4418973/normal_6051df5260487.pdf
    • https://cdn.sqhk.co/zasokolof/gdkiejb/42266270345.pdf
    • http://bullbananavannaone.xyz/30807943227pu26l.pdf
    • http://3203epworthcres.com/jazomukotulaxujadazu6wwz2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/biwuwukesazef/abzan_company_modern_guide.pdf
    • https://s3.amazonaws.com/wixamupelinere/google_script_sheets_app.pdf
    • https://s3.amazonaws.com/xofalepelala/can_you_cook_frozen_chicken_tenders_on_a_george_foreman_grill.pdf
    • https://s3.amazonaws.com/geraromu/dakogasewetu.pdf
    • https://s3.amazonaws.com/tonemakopinibem/bexojawol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a3.bin
88bb657560a7074cc4ee58ee874c3c34f0e506c6b96c203518203144dd9b6e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A3 4888 bytes
font_01_sfnt_off0000e335.bin
4a0b48443a1459cdfdee582aa545e47704b7baba29e6b1b9c1186ee74f9573f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 11964 bytes
font_02_sfnt_off000108e1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E1 4324 bytes

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