Malicious PDF — malware analysis report

Static analysis result for SHA-256 577c87a3787faebc…

MALICIOUS

PDF

75.6 KB Created: 2020-12-24 22:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d434097f3cae041334c8a702f1f8b273 SHA-1: 8f00f364f04c8233cd248406caa8b0e4fc866d26 SHA-256: 577c87a3787faebc50af7c4dc19ca3d824e52ee7962390d5807a72e422eda873
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as book titles or search results, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8799

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/aws?utm_term=sea+cadet+badges+on+uniform+uk
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/gekagajoliwetimulu.pdf
    • https://cdn.sqhk.co/xolizoxime/jhicggR/the_cw_the_100_season_7_episode_12.pdf
    • https://cdn.sqhk.co/lasesekov/icxjcie/81750906467.pdf
    • https://cdn.sqhk.co/dufadafakuti/ggifjdt/39461626844.pdf
    • https://nivejuva.weebly.com/uploads/1/3/4/7/134713874/nasareda.pdf
    • https://teputire.weebly.com/uploads/1/3/0/8/130813428/wegujujewo_darof_waloniwi.pdf
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/4044555.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jamokaroxoj/the_routledge_concise_history_of_science_fiction.pdf
    • https://s3.amazonaws.com/lopazura/vetto_black_clover_wallpaper.pdf
    • https://s3.amazonaws.com/zonebon/bazoseralomamasugotumumel.pdf
    • https://s3.amazonaws.com/befarekogol/1759958385.pdf
    • https://uploads.strikinglycdn.com/files/34ccb560-54ca-487e-8563-d1c4aece0e63/kawasaki_zx6r_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/7f815d5c-6355-476c-a124-1816252ee58d/29526051844.pdf
    • https://uploads.strikinglycdn.com/files/aa535a00-1984-48cd-89fe-3e8c38bc4397/lulawewabulemerovu.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109c2.bin
3049b47f6f320a60449a8e895939af4f832cb88b06a25f71ddb2ed7690fcc65c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 5616 bytes

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