Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca06f699911baca…

MALICIOUS

PDF

83.0 KB Created: 2020-11-18 15:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8037eb7d9aa7bd24d85869c2799d5428 SHA-1: 5d4f014805de867c608b3438a1a9e198e6f20728 SHA-256: 8ca06f699911bacad010f0cf0ec9aa940189e862af62d274f585133e0add2404
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying it as a "PDF_SEO_LINK_FARM". The primary malicious URL identified is "https://traffine.ru/aws?utm_term=kiss+the+rain+sheet+music+easy", which is likely used to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing or trojan variant.

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://traffine.ru/aws?utm_term=kiss+the+rain+sheet+music+easy
    • https://juwimifabofif.weebly.com/uploads/1/3/4/3/134369341/8869b40ba584da9.pdf
    • https://sarixibaparuve.weebly.com/uploads/1/3/4/3/134382026/2616199fd8a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0424a4e3-4aec-4fe9-85cb-6b60bf656c76/harley_davidson_collectibles_price_guide.pdf
    • https://uploads.strikinglycdn.com/files/fadd0397-3848-4113-8681-8702793d295a/71869190353.pdf
    • https://s3.amazonaws.com/pozokimepe/new_ee_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/22985cc9-96cb-484a-a327-470cec46a264/calendar_2020_september_12.pdf
    • https://s3.amazonaws.com/dofufiri/car_title_loans_tulsa_oklahoma.pdf
    • https://uploads.strikinglycdn.com/files/9fb8926d-4be8-4656-b8a1-1863e50e467b/53271371903.pdf
    • https://uploads.strikinglycdn.com/files/a0033bfe-9d03-4e0c-b274-c422e959617c/bogimorowim.pdf
    • https://uploads.strikinglycdn.com/files/0c373213-73ef-45be-9cad-67bcf86e36c8/vabelopitobimajufu.pdf
    • https://uploads.strikinglycdn.com/files/6d9818d8-9834-4325-ac38-aedf070531e6/tugixirafisenivulepi.pdf
    • https://s3.amazonaws.com/memul/61186089094.pdf
    • https://s3.amazonaws.com/felasorarabipis/32361223022.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e736.bin
3b31a9a02742aa48fb163bac2a9dcaaf504e2163ce21823bd7bcb4caaa816bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 5076 bytes
font_01_sfnt_off0000f856.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF856 3720 bytes
font_02_sfnt_off000103b9.bin
9a71de4f68fb2c3121a3290e7ed553f59d991ee8b0e2415049c6152b3d8c0e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B9 11100 bytes
font_03_sfnt_off00012991.bin
d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12991 16100 bytes

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