Malicious PDF — malware analysis report

Static analysis result for SHA-256 1698953010c5554c…

MALICIOUS

PDF

71.4 KB Created: 2020-12-28 16:36:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33b31e7b4c08f5874b351b584db51881 SHA-1: d1074c6c557ebc82dbacb6ad66862a8b26099f7d SHA-256: 1698953010c5554ca9383f53572daef791bdaa837e169bd1f2a0b166dce4d5ba
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous embedded external links, with a critical heuristic identifying a link farm. The primary malicious URL identified is 'https://traffnew.ru/strik?utm_term=nora+fatehi+new+song+download+mp3+mr+jatt', suggesting a phishing or malware distribution 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://traffnew.ru/strik?utm_term=nora+fatehi+new+song+download+mp3+mr+jatt
    • https://cdn-cms.f-static.net/uploads/4426066/normal_5fa7d62092df5.pdf
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5fcd302d05c31.pdf
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f99b4dbb5493.pdf
    • https://cdn.sqhk.co/sebudesusoj/9ibjdmJ/janoderapufimok.pdf
    • https://vagifobulipap.weebly.com/uploads/1/3/4/5/134595928/jakamedalo.pdf
    • https://cdn.sqhk.co/balekunu/Rahihjv/fidget_spinner_simulator_oyna.pdf
    • https://cdn-cms.f-static.net/uploads/4391898/normal_5f9d2d7c53c9b.pdf
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5fae42ade41aa.pdf
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/xaxebujakaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sinamozagemoger/wepiketobuv.pdf
    • https://s3.amazonaws.com/leguvefu/41327289414.pdf
    • https://s3.amazonaws.com/juliziwojatige/65691630332.pdf
    • https://uploads.strikinglycdn.com/files/4bbc925b-06e9-4bf0-8b36-fe63cf46b8b4/veryfit_2.0_smart_band_manual.pdf
    • https://s3.amazonaws.com/pazerogasarinu/dureso.pdf
    • https://s3.amazonaws.com/xeponodij/duzomesomikarefabab.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_off0000c96f.bin
3d2eeb3e97460b2f2f9e2b8682b633a3aaa24fe130175126185d29b8c7004cdf
pdf-font-stream PDF embedded font (sfnt) at offset 0xC96F 5544 bytes
font_01_sfnt_off0000dc37.bin
f654fa2091529c5eb69b4b8fb4f76f3cf8793eb626187a4bccf166f5a8383da2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 10688 bytes
font_02_sfnt_off000100ac.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x100AC 4324 bytes