Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d9665992976de6…

MALICIOUS

PDF

80.1 KB Created: 2021-06-12 08:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cd955735e0a6a294f862c19cf971b236 SHA-1: eecaec2e6f593a1551a5eea87ade4e7f3d582436 SHA-256: d3d9665992976de6aae37095bfa1d05483931acf53e0d1ac43d265f5e1fe3795
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/123?utm_term=whatsapp+application+for+java+phone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450884/normal_60314ddc7d038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459027/normal_6007bc74f29dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_604d129f7f7d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410989/normal_5ff89c664e3dc.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://welomobo.pbworks.com/f/diablo_2_merc_guide_1.13.pdfIn PDF document text
    • http://metudebebi.pbworks.com/f/86524473006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa08305-276c-4188-956c-58fad76029ec/father_and_son_matching_suits_ireland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356c4e34-6826-4540-b713-07c409e4fb0f/gadakojafija.pdfIn PDF document text
    • http://pobepamuti.pbworks.com/f/wizunotixus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd82e94d-e277-4d12-b8a2-4fba0438d94d/ropirolalujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa800acb-85a1-4e6f-a58d-c459c8b5e2d3/sonic_drink_sizes_oz_medium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e5e5d4e-de74-4974-b2bb-3c90467d3a87/annual_leave_application_email_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f481900-5abe-4d36-91b6-d37a3942981b/37039840221.pdfIn PDF document text
    • http://zekapotog.pbworks.com/w/file/fetch/145162374/goblin_shaman_dd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7620a412-89f5-4b9b-9c20-eed574a68325/zezadelogi.pdfIn PDF document text
    • http://zovafidat.pbworks.com/w/file/fetch/145173414/togapagito.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 5040 bytes
SHA-256: 9ff8cf6db0883e729db0e99e56b03c1b2a17c4fae0cfed5d6aec69b9f31f57bb
font_01_sfnt_off0001005f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 10768 bytes
SHA-256: 38313cc6a0e001eff99d72578b21f28468ac1d32aff1d56612fac7f90f627303
font_02_sfnt_off0001250b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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