Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb673be562e0721d…

MALICIOUS

PDF

74.8 KB Created: 2020-12-03 16:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e508fd2f1aa44559f209a60a15222ef8 SHA-1: 185650615ee2d8cda7752d31b20f259bc018805b SHA-256: eb673be562e0721d345c3e48652f953fa14d04578e9cc34d95fc1188806b4f54
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a phishing attempt and a link farm. The document body, though heavily obfuscated, contains references to 'Amazon music app for android', suggesting a lure. The presence of numerous external links, including one pointing to 'trafftec.ru', indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=amazon+music+app++for+android
    • https://static.s123-cdn-static.com/uploads/4371790/normal_5fc6c8d39d53a.pdf
    • https://cdn-cms.f-static.net/uploads/4387430/normal_5fb50c08e4a05.pdf
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/veruxezovesogedo.pdf
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5fc3a63bde88a.pdf
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5f9e1d67661c2.pdf
    • https://cdn-cms.f-static.net/uploads/4460450/normal_5fa14f5fb00b5.pdf
    • https://cdn-cms.f-static.net/uploads/4498404/normal_5fbb1daa3d394.pdf
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fbd68dacb141.pdf
    • https://fapusazi.weebly.com/uploads/1/3/4/8/134849501/pulajujujopenuru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5d147081-8b87-4f95-ac4e-d62bc1b22d26/riratodupijawagufunobine.pdf
    • https://s3.amazonaws.com/lorugipopuxe/android_share_intent_custom_chooser.pdf
    • https://uploads.strikinglycdn.com/files/ef00fda1-0eba-41cd-a9ac-6168bc1f99ca/wadeweget.pdf
    • https://s3.amazonaws.com/pusori/haines_city_water_quality_report.pdf
    • https://uploads.strikinglycdn.com/files/b2fdb5b4-72d9-42d1-b78e-87fcaaa93cb3/bomurojodivox.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_off0000dd3d.bin
a910c96a33dc895bd963dc6e4e895d728a00e81662e16c56ff7a2d2d12d36638
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 4992 bytes
font_01_sfnt_off0000ee0d.bin
885bef27fc6533c64c1a883819f20179f4506efa9e7e90017623c0fb3555b940
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 10096 bytes
font_02_sfnt_off00011083.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x11083 4324 bytes