Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e94179d8168e69…

MALICIOUS

PDF

83.7 KB Created: 2021-02-01 09:16:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 249d9a092ad3270b00bf7716f940345c SHA-1: 2fd7bf0fed98fb7cc43e492289e8cfb405449f7d SHA-256: 26e94179d8168e69441833a2c675897bab970ee0f77aee7337cd79b0035786e2
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely leveraging techniques associated with spearphishing attachments.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/123?utm_term=scat+test+prep+pdf In PDF document text
    • http://datab.vip/diy_halloween_paper_crafts_easyme41e.pdfIn PDF document text
    • https://cdn.sqhk.co/fazovivum/QF6ighc/16415775814.pdfIn PDF document text
    • http://todayit.pro/89540587044csdlx.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/1896599.pdfIn PDF document text
    • https://cdn.sqhk.co/noruwotil/g5Ljfgf/litinikumu.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/OQiejdK/61309845883.pdfIn PDF document text
    • http://benosetib.iblogger.org/fetumusavo.pdfIn PDF document text
    • http://wei-nmvc.com/mavagurudelowisix7r3.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/a9jgjbt/miposesugiza.pdfIn PDF document text
    • http://technodom11.com/96312939814236r2.pdfIn PDF document text
    • https://kusafulidofet.weebly.com/uploads/1/3/4/0/134017607/8532396.pdfIn PDF document text
    • http://ropakega.22web.org/100_cotton_sheets_sets_queen.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/4b0704a3e52bfd8.pdfIn PDF document text
    • https://nugonerikol.weebly.com/uploads/1/3/4/8/134883066/laniwugalijo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rorives/google_drive_monthly_calendar_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/krita_shortcuts_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/pontiff_sulyvahn_parry_guide.pdfIn PDF document text
    • http://wefubosapinu.rf.gd/sositeb.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/pijevenat.pdfIn PDF document text
    • http://buzurofomurab.rf.gd/coned_report_power_outage.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 4744 bytes
SHA-256: 276c6bc1970a70c2c638e674b0a2281d781a38cf7d8c3609e02307fcd097b17b
font_01_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 10912 bytes
SHA-256: 0377f950ae36e0b74bf10ff6fd4d675a3e34a25c9e544297f92bbfffa88eeb63
font_02_sfnt_off0001335c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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