Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c265cb459029b17…

MALICIOUS

PDF

102.0 KB Created: 2021-03-14 17:09:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 872e9da3d6a483c556fa82a9bab32362 SHA-1: 573eb07f501c7e6a7e9c37d36ebf3a9354d114d2 SHA-256: 0c265cb459029b171438b0d8061f7c26d608adca710d11ceef72edc378b31748
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=cardiomegalia+tratamiento+pdf PDF link annotation
    • http://lotukaguw.sportsontheweb.net/lixoboponuvasupewop.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/eiaNAjj/free_crafting_and_building_games_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471488/normal_5ff9f14c4ae6c.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/how_to_connect_canon_mg2520_printer_to_computer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5fdd731cc2051.pdfIn PDF document text
    • https://cdn.sqhk.co/zeragekub/1hbDaHM/37898229086.pdfIn PDF document text
    • https://cdn.sqhk.co/sofawaju/RJxifgf/45104292678.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/is_it_expensive_to_maintain_a_jeep_wrangler.pdfIn PDF document text
    • http://rijoginijamibeg.mypressonline.com/92091997513.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/toihUal/31821289219.pdfIn PDF document text
    • http://madusotiju.22web.org/octonauts_creature_report_lion_mane_jellyfish.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/rumitujinelubomojexowil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443819/normal_5fe8896eab359.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/KJ27Ogg/28501967764.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamujigip/dgfNBii/52112467081.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/what_is_the_interior_angle_of_a_4_sided_polygon.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://jabenesejamuji.rf.gd/argosy_desk_manual.pdfIn PDF document text
    • http://videwebik.epizy.com/75594064908.pdfIn PDF document text
    • http://piwuzodoxomox.epizy.com/thank_you_maam.pdfIn PDF document text
    • http://mifotabelimudon.myartsonline.com/jukimivokamotidokurik.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_off00014090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14090 4996 bytes
SHA-256: ee538752cf6ffa71a5213399366becc1ad41b9861cf8532a972c24e9fd0788b0
font_01_sfnt_off0001517d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1517D 13040 bytes
SHA-256: e6553c3060db2923dd2f8da61647fc4f45037d51c2054d6346e7302baab10d23
font_02_sfnt_off00017b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B02 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333