Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66905f3b8c660c0…

MALICIOUS

PDF

76.1 KB Created: 2021-05-28 22:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b576c61c752293cde8d57c6fed4794bc SHA-1: b0df07e49b7c1e4910576e7162f0a279b41ecfd0 SHA-256: f66905f3b8c660c062992bedc2ccab1f3c9d14033492542b8369fae513c6e973
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, suggesting a link farm or phishing attempt, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body's mention of 'hereditary movie download english' serves as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/strik?utm_term=hereditary+movie+download+english
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fee862393c37.pdf
    • https://zutiwijutorezaz.weebly.com/uploads/1/3/4/3/134354078/sonad.pdf
    • https://static.s123-cdn-static.com/uploads/4388183/normal_5ffc0505427a4.pdf
    • https://cdn-cms.f-static.net/uploads/4365584/normal_605d6bcc962ab.pdf
    • https://gadakuvinud.weebly.com/uploads/1/3/1/8/131871823/mizize-kojowugixowovem-juzuwotudu-dakirapu.pdf
    • https://cdn-cms.f-static.net/uploads/4467571/normal_604b2340630a7.pdf
    • https://jufufowepum.weebly.com/uploads/1/3/5/3/135348100/zugipulazukutug_navologaj_lomosomuxuna_dajawatogofisej.pdf
    • https://fatopozan.weebly.com/uploads/1/3/4/5/134581496/zorezijirugo.pdf
    • https://cdn-cms.f-static.net/uploads/4425483/normal_60604b219f59c.pdf
    • https://bajomunimiru.weebly.com/uploads/1/3/1/0/131070213/5805339.pdf
    • https://xeneniwavufew.weebly.com/uploads/1/3/2/8/132814439/bokowuxo_zikanetutubuduz_volagabu.pdf
    • https://cdn-cms.f-static.net/uploads/4458150/normal_604422c1e0392.pdf
    • https://cdn-cms.f-static.net/uploads/4387922/normal_60156ee9c50e2.pdf
    • https://bijariruxo.weebly.com/uploads/1/3/1/3/131382387/6485613.pdf
    • https://cdn-cms.f-static.net/uploads/4389599/normal_601bfa45a8cd8.pdf
    • https://dujisiseruw.weebly.com/uploads/1/3/0/7/130776106/motulinosodore.pdf
    • https://cdn-cms.f-static.net/uploads/4408596/normal_6016f12a6fe31.pdf
    • https://cdn-cms.f-static.net/uploads/4420037/normal_6042d4d92afbc.pdf
    • https://nasolebad.weebly.com/uploads/1/3/4/6/134695036/3967908.pdf
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/7553141.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c520b3f2-62c9-4217-9bae-4fb20ffdd2e5/ruteme.pdf
    • https://uploads.strikinglycdn.com/files/e27d5e97-2058-4ea9-9f39-00184e06f730/gujitalodijegebawidasoj.pdf
    • https://uploads.strikinglycdn.com/files/b0b5f115-93c7-4b74-9ac2-1847bcb55d59/sapimalewirubi.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_off0000ec5b.bin
4da23e048da81140783499aa42aa270d7e157581e21541130c937852522a4adb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 5452 bytes
font_01_sfnt_off0000fed1.bin
b222a4da7581b2218f5abb844b829890f2a9506cda00db25d36beabbe38bb2d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 10528 bytes