Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eecd7994b5a4628…

MALICIOUS

PDF

65.8 KB Created: 2020-12-19 17:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2541a228c36d9df3be4e7aa8d6d0876c SHA-1: 184b4c9352ec855699e2be259e4091fe5923d421 SHA-256: 1eecd7994b5a46285fd84910adb819066ff6d14dce24921837477f5def6a7074
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing lures. Heuristics indicate a high likelihood of malicious intent, with ClamAV specifically identifying it as a phishing trojan. The embedded URLs, such as 'https://trafffi.ru/123?utm_term=needless+casualties+of+war+pdf', are likely used to redirect users to malicious sites.

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://trafffi.ru/123?utm_term=needless+casualties+of+war+pdf
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/c8851.pdf
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/ligovobosanut.pdf
    • https://xedexebil.weebly.com/uploads/1/3/4/2/134235570/dimolimilegujujeb.pdf
    • https://dosijasapuzab.weebly.com/uploads/1/3/4/7/134702057/722e0ccc28d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0b4e4c89e1c4b8fbd626a/t/5fc110de9b1ed03538015455/1606488287963/10243413349.pdf
    • https://uploads.strikinglycdn.com/files/b71ef7c1-5cc2-46ba-afc1-d7652b9bc5c4/historia_de_los_aditivos_para_concre.pdf
    • https://uploads.strikinglycdn.com/files/41a794b7-0eb9-4dda-be70-132ec33370aa/frigidaire_gallery_dishwasher_fgid24.pdf
    • https://uploads.strikinglycdn.com/files/24847637-3086-4101-b589-bca96df0e7ad/tegarosajorexa.pdf
    • https://uploads.strikinglycdn.com/files/1f274964-018d-48d7-8aeb-604bd7930c94/dubusitopasumufovim.pdf
    • https://uploads.strikinglycdn.com/files/f2c9eb16-1227-475a-8ee4-86688b7e83d3/72269071616.pdf
    • https://uploads.strikinglycdn.com/files/dd5d2d82-f3ac-4784-adb7-65891b83bf09/autocad_2020_full_crack_torrent.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_off0000c69f.bin
fb812ce21b94c9b7352ca20056463339bdd18e14ced7cb07fae961cb75e457bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xC69F 5208 bytes
font_01_sfnt_off0000d882.bin
e14f070b871a6a7733661de533deafcc449ee9bbf1ae4190b4f0d7d15e20251c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD882 9984 bytes