Malicious PDF — malware analysis report

Static analysis result for SHA-256 6932ab8ca59a25d6…

MALICIOUS

PDF

72.3 KB Created: 2021-03-01 09:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7073c35f2dc7bc12c4113566dd887b3d SHA-1: eacfaaea1ba8157691eaab8fe9484ba9503ad978 SHA-256: 6932ab8ca59a25d625fb1c37a022f74a58d63cf28cae02f15427bef739648423
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, appears to be a lure related to 'dachshund names', masking the malicious intent.

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 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.
  • 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/aws?utm_term=best+names+for+male+dachshunds PDF link annotation
    • http://unosital.space/xivezawi6h3wt.pdfIn PDF document text
    • http://aycotoro0.xyz/zoguwataxejotiw1uvu.pdfIn PDF document text
    • http://giocodigital.space/attack_on_titan_season_3_part_2_name6eda9.pdfIn PDF document text
    • http://lnstagramsecurity.net/kipibawipa340q.pdfIn PDF document text
    • http://airbin.top/nc_drivers_license_practice_test_quizletf782y.pdfIn PDF document text
    • https://vabisoxapulaji.weebly.com/uploads/1/3/4/4/134444495/22ee08d0.pdfIn PDF document text
    • http://daravto18.ru/405500834097cb6p.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/xinevose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5fc86283e9367.pdfIn PDF document text
    • http://i-men.ru/88615158615hzwv6.pdfIn PDF document text
    • http://stixlife.info/whiteboard_animation_software_for_pc_freelmb3j.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/tozijezomuxededubo.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/gchbRnr/free_throw_line_basketball_fiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494888/normal_601985e3c0fd1.pdfIn PDF document text
    • https://safagaxoxikow.weebly.com/uploads/1/3/4/0/134096848/vibidiziba.pdfIn PDF document text
    • http://astrology-personal.online/66601355603c0nvi.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/S5NPmzq/4_in_a_row_play_free_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476930/normal_5fcaac805ebb1.pdfIn PDF document text
    • https://wetebofi.weebly.com/uploads/1/3/1/6/131608016/3639472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498834/normal_6035c31bcaca4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBF 5308 bytes
SHA-256: 3d920b510327a067e307af2c07b529145b8390a7f83d7dbf2d4446361bc4bca2
font_01_sfnt_off0000f19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 10152 bytes
SHA-256: c3e9e126d544e864aaf3f3dc5a423cf707d9947028f53d3bb13eeec48a4dad4a

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