Malicious PDF — malware analysis report

Static analysis result for SHA-256 46399301a5e983cf…

MALICIOUS

PDF

69.9 KB Created: 2021-03-31 03:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0a002773068939dcac5dfaedff0af3b9 SHA-1: 8d33a602e16fcd8b6f8b31975ce8823a3bdfdd2d SHA-256: 46399301a5e983cf913d2622f6e09f766d4d135fbc94f92e9e314fe6a74d714f
156 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 point to other PDF files, suggesting a link farm designed to obscure malicious activity. The primary URL, jumiwimov.ru, is associated with a phishing lure related to driver downloads. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jumiwimov.ru/strik?utm_term=hp+probook+6570b+drivers+download+windows+7+64+bit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379369/normal_60001e8c0b450.pdfIn PDF document text
    • https://bovimifukid.weebly.com/uploads/1/3/4/8/134882826/7cb9b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_6054d24426ee7.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/talad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5fdc4818c57bb.pdfIn PDF document text
    • https://lemusovigezamo.weebly.com/uploads/1/3/1/3/131381045/8708980.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487626/normal_60082599ae12f.pdfIn PDF document text
    • https://roxadaxakisa.weebly.com/uploads/1/3/1/4/131437443/5b15f5.pdfIn PDF document text
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/joxevo.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/4984794.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jifesu/94414446718.pdfIn PDF document text
    • https://abf133a7-37c0-4616-b653-d99fd306bce3.filesusr.com/ugd/5c8236_7bb6642780a94dab80952a71a64402f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomudufe/diramisoginelofalovivo.pdfIn PDF document text
    • http://morufigalolo.rf.gd/62650041152.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_198c48bde93f4446bb20a2485a2dd020.pdf?index=trueIn PDF document text
    • http://gizogebinide.rf.gd/wordly_wise_3000_book_5_test.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/tenasuxujobawuriti.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/23377906152.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/41509601101.pdfIn PDF document text
    • http://rakulewozagax.rf.gd/free_butterfly_printable_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD146 5856 bytes
SHA-256: c1c7dcf9be80cd53e2283f4ecabe45ef94cda9d9f5ea7d9fc9f63bb9eb2ab356
font_01_sfnt_off0000e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 10868 bytes
SHA-256: 1c826ac7fc46274ee14b9d8ec227cbd411948acbfd86a3433ee269d3b9c02bdf

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