Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db7726c5a3f26e5…

MALICIOUS

PDF

73.8 KB Created: 2021-02-23 05:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4826e88960dd291e951449a1f406e1cb SHA-1: f2d7b9cee5786804943ed2102d87b78902cc4fd8 SHA-256: 8db7726c5a3f26e5071a2634794680fa170c2ffb5599c54e27e537a376f48b74
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics and an ML classifier, indicating a phishing or trojanized nature. It contains a large number of external links, suggesting a link farm or redirection scheme to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to arrest records, aiming to trick users into clicking on the embedded URLs.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=portland+arrest+records+allison+marie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4530868/normal_6013f4b47fec0.pdfIn PDF document text
    • https://cdn.sqhk.co/gobefuvumi/cdgdPhd/nasacort_generic_walgreens.pdfIn PDF document text
    • https://cdn.sqhk.co/difejekexe/haggTzA/block_fighting_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_5fd3b6e213e96.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/a9geKjb/lg_xboom_go_pk5w.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/13dae50646.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/df493a03f63f6ea.pdfIn PDF document text
    • http://blancer.xyz/is_the_bible_in_greek_or_hebrew21hlt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5ffa7f8e6c19b.pdfIn PDF document text
    • http://detonic-shop.website/cockcroft_walton_voltage_multiplierp93z5.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/how_to_heal_childhood_trauma_spirituallyvjvp8.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/nefunupu/43563947953.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/32173744958.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/88524868790.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/95487198195.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/kerowaxaxevokukuwosemis.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/forixawotubakafeg.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_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 5084 bytes
SHA-256: 680b1f0470898bef0c7d9dd0d1bac89331a4faae4bb3db25c2019e6b28cba6fe
font_01_sfnt_off0000f73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73F 10072 bytes
SHA-256: 0b3460fc6bb6a72e5f330d325b23c828c59a677bd7e7e630c2faae911aac7a48

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