Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00c477b4896502b…

MALICIOUS

PDF

68.3 KB Created: 2021-04-28 07:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 07c0ad77c62f57f04ba924199775df46 SHA-1: 9b957ffeb2a3599c9421b9d0bd8b2b4b319ec987 SHA-256: b00c477b4896502b8e803eca96e26169aa9a74ccfb570007951f2837bcd4c9ef
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external domains, many of which are associated with disposable hosting and link farming, indicating a likely attempt to lure users to malicious sites. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution vector.

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/strik?utm_term=resisting+happiness+matthew+kelly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494888/normal_601517201c49c.pdfIn PDF document text
    • http://eurofamily.pro/gadijozajitafapukqj4v.pdfIn PDF document text
    • http://peramabejakes.sportsontheweb.net/antioxidantes_alimentos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_605be304e388f.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/4142194191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_601a2dbd339e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60150d414bc14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_5fd2e6f2ad296.pdfIn PDF document text
    • http://navaram.online/21320378119zftau.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462350/normal_5ff30e11a6ac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_605a3c5aa0234.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kudowo/top_10_gmat_coaching_institutes_in_delhi.pdfIn PDF document text
    • http://mejizemobimoli.epizy.com/farming_simulator_15_download_pc_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/tawejufifod.pdfIn PDF document text
    • http://zizizototumat.rf.gd/vlc_media_player_for_macbook_pro.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03A 5404 bytes
SHA-256: 3a8c7a8f842d2e05655dafe9544dc8e83f8886982363e30a6c1943c18a5f6806
font_01_sfnt_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 9960 bytes
SHA-256: 3283551410af81a208bc4428aa01b491ea193627c6f4ce929984f0df64b810c5

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