Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c0822172434455…

MALICIOUS

PDF

70.1 KB Created: 2021-02-28 06:14:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 674ccea4633f80f2b949bc16fd0b67b5 SHA-1: 213b3d62c70d93ad2f4086fdcf4f584e73778b91 SHA-256: c2c0822172434455c7c435afae1c3ec190c6435494d77fa8bcefd5bf3f5dea59
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious content or phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/award?keyword=the+shining+sequel+trailer+youtube PDF link annotation
    • http://bestpriceforukraine.xyz/17784983420vgtxq.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/gusubo.pdfIn PDF document text
    • https://cdn.sqhk.co/tizudukokeni/jc5Tgiy/warplanes_ww2_dogfight_switch_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5fe91cc8c10ad.pdfIn PDF document text
    • http://burrrhey.tech/kirby_vacuum_just_stopped_working40mcg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_602c10ad3550c.pdfIn PDF document text
    • http://trycabinets.xyz/certificado_digital_serasa_driverc19dj.pdfIn PDF document text
    • https://tibanevugite.weebly.com/uploads/1/3/4/6/134655495/f2af3.pdfIn PDF document text
    • http://vesibigezedenu.iblogger.org/formula_for_diagonals_of_isosceles_trapezoid.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/vusatewaxifewez_muvufekipitom_nawireb_jarulote.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480187/normal_5ffa46c2cab27.pdfIn PDF document text
    • https://tazusarativiwu.weebly.com/uploads/1/3/4/5/134510609/sabunajode.pdfIn PDF document text
    • http://my-favshopf.online/monkey_go_happy_4_unblockedy07op.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5fd252f068406.pdfIn PDF document text
    • http://bcipreactivaperu.com/social_psychology_gilovich_4th_edition7tvur.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/RJeXKVj/63233950.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
    • 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_off0000c8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D3 5148 bytes
SHA-256: f86683df40eaa6eab39472f20bb3163f5ef0b9db5a3521917a105f1add373b1e
font_01_sfnt_off0000da44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA44 10296 bytes
SHA-256: d7cb6df256ccfa2937f361385e120a16234e5bbc218f7e323a5a813b091e5e21
font_02_sfnt_off0000fd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD89 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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