Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7d669e28fd0a7b…

MALICIOUS

PDF

79.2 KB Created: 2021-05-12 10:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: be1361e7169bea2b7e1a179a83b4e659 SHA-1: 44a55a84f91166064afc0a83704793e4a36828ff SHA-256: ce7d669e28fd0a7b432951319cbbdfd9da8e6440359d1885bc94f399a811db56
126 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document's content, though heavily obfuscated, suggests a lure related to household appliance maintenance, likely to trick users into visiting the malicious URL. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing or credential harvesting attempt.

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://maypoin.ru/strik?utm_term=how+to+clean+zojirushi+hot+water+dispenser PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fe844ea08f2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447649/normal_6000aec20e54e.pdfIn PDF document text
    • http://lovelyhouse.online/macklemore_can_t_hold_uszqbtj.pdfIn PDF document text
    • http://lelazuw.iblogger.org/compendio_del_catechismo_della_chiesa_cattolica_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5fdea07d3b342.pdfIn PDF document text
    • http://mazafaka69pussy.online/94823090242cza3e.pdfIn PDF document text
    • https://cdn.sqhk.co/dapalufited/ggqjdiQ/bts_korean_music_festival_2014.pdfIn PDF document text
    • http://counterman.ru/377627516044nrza.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/4hcfhc4/temab.pdfIn PDF document text
    • http://biditudoti.22web.org/93416329777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_c66d31ebb7ce4d29948d61c29cb3ebb3.pdf?index=trueIn PDF document text
    • http://tofezaniv.rf.gd/wavonezofudobujigozuw.pdfIn PDF document text
    • https://a97cc435-ef8e-4ffb-8544-4b9c0bda5a6e.filesusr.com/ugd/7ab440_66ac0e9933294191a20bf1756954a35b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2387c441-5750-44b7-879c-bdf5b2475706/94055992966.pdfIn PDF document text
    • http://jalasofumikom.rf.gd/how_to_write_arabic_calligraphy_for_beginners.pdfIn PDF document text
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_bd626ff3713047bb83ca70150faa4ce9.pdf?index=trueIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_7ec59a1b66684c8593397a48c8f598ca.pdf?index=trueIn PDF document text
    • https://d4a58959-25bc-41ae-a48c-99f47e3c4711.filesusr.com/ugd/4dab1e_a48eb5f09edf4755889432fdb8616d49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0edfe123-c526-4fc0-8dbc-c7ea58752aaf/24938366295.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF794 5340 bytes
SHA-256: f4f42d6a2525541ff293656a1c8da8cbf3549bcc877f02ab4366812f15e1a200
font_01_sfnt_off000109d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D0 11004 bytes
SHA-256: a097a5c02825cf5e138282ab3130b1af9d476af43ace50744cf0f9fcbdec6738

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