Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9d3795bef9f59c…

MALICIOUS

PDF

71.3 KB Created: 2020-12-06 08:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d67ba18c5e6ff2d0ec6cc5a68c77141c SHA-1: d2bbad7beb8574c482e6b0eee75caa2905358cec SHA-256: ac9d3795bef9f59cf9112a33c8f20985a9ce2b9c56f56ff09befb7d583e22dc8
96 Risk Score

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'traffking.ru', which is likely used to host a phishing page or a second-stage payload. The PDF structure and embedded content suggest an attempt to deceive the user into visiting this malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffking.ru/strik?utm_term=what+is+an+angiosperm+example
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5fada231b066a.pdf
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5fa50d54c63ed.pdf
    • https://cdn-cms.f-static.net/uploads/4459025/normal_5fb4e23d9943f.pdf
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f87cf32eb53d.pdf
    • https://cdn-cms.f-static.net/uploads/4368772/normal_5f9947e148883.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/de7bea9c-4d30-4efd-9f05-3d1e850aa8c8/xotuzexageliduva.pdf
    • https://uploads.strikinglycdn.com/files/0eac16ef-bdd9-4add-b34c-7d0239f3660a/36085445905.pdf
    • https://static1.squarespace.com/static/5fc58f8c8787e879898b879b/t/5fc8dee6094cf7617dcb46a4/1606999783323/general_sniper_na_age.pdf
    • https://uploads.strikinglycdn.com/files/ff4908b8-34d0-42ea-8d6f-c5ee8bba47e1/zigulevovexo.pdf
    • https://uploads.strikinglycdn.com/files/1023d13d-67a2-44e0-80e3-26d97b2f43ea/kotisorax.pdf
    • https://uploads.strikinglycdn.com/files/cf9fcabd-e718-4f5a-9e51-7d3da96a881b/mega_man_intro.pdf
    • https://uploads.strikinglycdn.com/files/e9fef0b2-5516-4b89-94ae-72b4b0481fb7/fewagoviso.pdf
    • https://uploads.strikinglycdn.com/files/d49dfc7e-73d0-4fa5-aaa2-e7aecede2dc1/68148642916.pdf
    • https://uploads.strikinglycdn.com/files/279fb70b-f939-4c48-9634-563ebdd2a69e/9227844315.pdf
    • https://uploads.strikinglycdn.com/files/fb55188e-6a79-4dc7-a4eb-78544aede0ae/dojomazosenikumosemaze.pdf
    • https://static1.squarespace.com/static/5fc13d0827a199023ab79d37/t/5fc3c8ac3f75b1664347c4f4/1606666413136/castle_rock_hike.pdf
    • https://s3.amazonaws.com/ritoma/ibpsguide_free_mock_test_ibps_po.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_off0000da87.bin
877fe7103d7d66746791d5cc6c1588bea23dda311674c20339b1b98cd8b545d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 5312 bytes
font_01_sfnt_off0000ec7e.bin
aeb4f3a0363b33ba5609bf78ec4e55883ab7e563fcbb320539a46e1e43890c5a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7E 10420 bytes