Malicious PDF — malware analysis report

Static analysis result for SHA-256 facad5ef01bc5198…

MALICIOUS

PDF

82.3 KB Created: 2021-02-27 15:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: faeafedc28aa709fdd94f7d21768426b SHA-1: 5cddc3d07bdae7a7dcea390943c99075035c61d2 SHA-256: facad5ef01bc51981bcc040db2529097fb7c744b235c4be2ae0c4404093e8af6
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm. Numerous embedded URLs point to potentially malicious or phishing sites, suggesting an attempt to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

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://bologen.ru/wix?keyword=of+plymouth+plantation+pdf+answers PDF link annotation
    • http://lnstagramverifycentre.com/23677309215e30e6.pdfIn PDF document text
    • http://sapazukuwujoji.22web.org/light_refraction_worksheet_answer_key.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/zezunalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_6029c3b8a1fe8.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/ekhdF3P/nejutesawokukunipabotataw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_5fc7650a3afc0.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/uhexhaM/53743254140.pdfIn PDF document text
    • https://cdn.sqhk.co/lofujumixas/jgjaige/how_to_draw_a_fighter_plane_ww2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_6014e0a59d3af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384468/normal_60055b8f971d3.pdfIn PDF document text
    • http://lnstagramverifycentre.com/durizi2ykp7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_5fd38fba436a5.pdfIn PDF document text
    • http://vashmaster.info/bruchrechnen_arbeitsbltter_5_klasseuwyik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_600ea3bbe5dcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393785/normal_5febde0488789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_5fdad3172ed01.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/onde_ocorre_o_ciclo_de_krebs.pdfIn PDF document text
    • http://ridunculus.com/78374045696pmsk9.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://kedisijusa.onlinewebshop.net/gunamerus.pdfIn PDF document text
    • http://zuzofigub.rf.gd/casio_g_shock_watch_battery.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A8 5384 bytes
SHA-256: 2debab1f2582dca6660958185680ca25330bce4d7252b09c0085ac7b37d17c03
font_01_sfnt_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 10848 bytes
SHA-256: 635b94ba44a6b2e373f725c643171eb960be7982edcab5b7da5e01c73ff48358
font_02_sfnt_off00011895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11895 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_03_sfnt_off00012d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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