Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba0e9443b1d251c…

MALICIOUS

PDF

75.8 KB Created: 2021-03-20 05:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2795386d9c506b2db00eb9d2f9198fb3 SHA-1: 77135d52d3b9057e09277f51588819b20381f562 SHA-256: 7ba0e9443b1d251cb00a42ea19eabc10896f1393b0ac6b4eedec9dc0a5f2505d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and is flagged by ClamAV as Pdf.Phishing.Trojan. The primary malicious URL identified is https://mezovuduw.ru/wix?keyword=air+assault+sling+load+study+guide, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=air+assault+sling+load+study+guide
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/fuduweluzesexa_gawonebumak_malokaturi_vodek.pdf
    • https://static.s123-cdn-static.com/uploads/4462982/normal_5fc6fb044dbf9.pdf
    • https://static.s123-cdn-static.com/uploads/4471948/normal_5fefaa731b146.pdf
    • https://cdn.sqhk.co/pibilebomek/GX6jhge/bunudabagizofi.pdf
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5fd04e917435c.pdf
    • https://jofanota.weebly.com/uploads/1/3/2/3/132302765/9614363.pdf
    • https://somubafe.weebly.com/uploads/1/3/4/4/134444697/8727161.pdf
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/4784200.pdf
    • https://cdn-cms.f-static.net/uploads/4414515/normal_5fdc0284d2097.pdf
    • https://cdn-cms.f-static.net/uploads/4424982/normal_601c8706017d7.pdf
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/2e6e432fbb8e5.pdf
    • https://bexenexitefixu.weebly.com/uploads/1/3/4/7/134725849/646f7.pdf
    • https://tejojixamabaje.weebly.com/uploads/1/3/2/7/132740549/fusak-sokiji-xezoz.pdf
    • https://cdn.sqhk.co/bexutavukaro/ifnjfgc/free_one_page_business_plan_template_uk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_533c15ca564345c2ad758d8c6a2a0603.pdf?index=true
    • https://uploads.strikinglycdn.com/files/64d0e35b-cfa8-45c8-a7d8-80385fa47eed/loraf.pdf
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_e5f87065906949bd8657fe001b5d8057.pdf?index=true
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_f8fa27f51ae34588a4723ff40d59e33d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2a9b600a-bdcf-43ce-bd98-abdb8ec9923b/tv_samsung_ue_55_js8500.pdf
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_4cefcc76d01c4fb69bd10c9dbd588cd9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b4f8185c-40e2-4356-ba7f-8a8f2f51223a/how_to_connect_jaybird_freedom.pdf
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_f3e060f75087440aaf7d1fb478e0b7f9.pdf?index=true
    • 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_off0000ec12.bin
04b8d0289da1105b0688fea3153efa81ac95a3d2d8b8243367c7d51ba77264a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 5084 bytes
font_01_sfnt_off0000fd6f.bin
a235d0e85a796546dba95c76a679d51509bbc0420e8c6a6a1f091cebb9f939d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 10600 bytes

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