Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bef245e36b00403…

MALICIOUS

PDF

73.9 KB Created: 2021-03-09 00:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5f2eb2ad961621a6e5edeaab9354b033 SHA-1: dcd7dddcdce1a5432ed21a226dc2c33c1bc6caaf SHA-256: 0bef245e36b0040384d68f00dea2c2716aa3bfec4c18b0fff12492ea642b2f0d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting domains and are associated with link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to product parts, directing users to suspicious external sites.

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://jumiwimov.ru/strik?utm_term=hoover+floormate+deluxe+parts+canada PDF link annotation
    • http://nncucuucuc.space/15874675822bm0gz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477637/normal_5ffc175ba24fa.pdfIn PDF document text
    • http://akfb.online/98316174399qng5a.pdfIn PDF document text
    • http://qwonder.space/vojetelo92qxd.pdfIn PDF document text
    • http://itawomen.fun/738274802550czet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_60396ba66f93c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505096/normal_5ffb4df6098a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_5fe1aa90142b9.pdfIn PDF document text
    • http://fkpravo.ru/a_mothers_reckoning_free_downloadez6e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fcdc6313e2a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_60198c395a0d1.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://zexumujadabexu.epizy.com/how_to_make_a_bridge_out_of_toothpicks.pdfIn PDF document text
    • http://kasesapat.rf.gd/85274301524.pdfIn PDF document text
    • http://xowofap.rf.gd/32856312729.pdfIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_0ec8e80b7fa94e609af778dc595d523e.pdf?index=trueIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_9cf3e4bc353d48a29582f21d4efa712a.pdf?index=trueIn PDF document text
    • http://fimaxopazeviv.rf.gd/6633540481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34cad41e-dd13-4a85-9df0-2a48fcbf4058/40390882929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd5f300-b2af-478f-809a-e9df1bc03f8f/how_to_play_muted_chords_on_ukulele.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_351f3499f3354f1ea47d1fc23f99babc.pdf?index=trueIn PDF document text
    • http://lanosewidem.rf.gd/law_report_citation_harvard.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_off0000d381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD381 5224 bytes
SHA-256: 553059028f209efc9b014b3b934ea144d7d04635995e642fe7f2bb042efd1757
font_01_sfnt_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 10764 bytes
SHA-256: bac7dee2113d5e2e0958ed660d18e092eb3e3125a58a2c9a26d2fb2c79071714
font_02_sfnt_off000109ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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