Malicious PDF — malware analysis report

Static analysis result for SHA-256 c838e98b29f7594a…

MALICIOUS

PDF

80.8 KB Created: 2021-04-18 12:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4b3e455c3de7af9dff242f7f68ff5d6a SHA-1: 92af466b039c1abdcce2fa28e44d25bdff6ec153 SHA-256: c838e98b29f7594ad5166ba54395541bfd5f6f867b0835573c6579bdc48ac404
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The primary attack pattern involves a link farm of SEO-optimized PDF documents, with one URL pointing to a potentially malicious domain. The document's structure suggests it's designed to drive traffic to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=how+long+is+the+acsm+personal+trainer+exam PDF link annotation
    • https://cdn.sqhk.co/musutalivun/osggghT/extreme_motor_mania_trophies.pdfIn PDF document text
    • https://zitajajelenineb.weebly.com/uploads/1/3/4/5/134512459/52472c.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/mosijonobezez.pdfIn PDF document text
    • http://fashion-deals.xyz/9683112805581ilb.pdfIn PDF document text
    • https://povebosi.weebly.com/uploads/1/3/5/3/135346093/rokoduvogazo_jumoja.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/Dgc5WhJ/78619427512.pdfIn PDF document text
    • https://wirevoge.weebly.com/uploads/1/3/1/8/131856771/rebeb-belutiwafuxozip-sojekotef-dipapedudemop.pdfIn PDF document text
    • http://ogranicbio.space/388384921232temz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_a9579a384fb243eea08a46947d21d128.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/guzoguwadim.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/bamavaliw.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/why_doesnt_my_excel_scroll.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182e5f74-022f-4a9d-b2e1-7502c57f459a/57876300601.pdfIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_e946dd03af3d48159d17b5a5ba53ea27.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc60b148-9d22-4f50-80cb-8599c6d5d8fd/sanowivuresanazemepilob.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/36046607236.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/automation_studio_free_full_version_crack.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_off0000fda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA6 5468 bytes
SHA-256: 277c41018cc9263f6a39976d9ffc911087d6b070c05c0597261477209b1d8eec
font_01_sfnt_off0001102d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102D 11188 bytes
SHA-256: 8f5758d59a41d334a870c38189724ab7d88e46ecf5b3eb5380ba92960710dc65

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