Malicious PDF — malware analysis report

Static analysis result for SHA-256 093bca1027f5b756…

MALICIOUS

PDF

87.3 KB Created: 2021-03-10 08:35:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4f4cccffbad376185e49d1b70e58b08f SHA-1: b60b582432e132d73f91b0e7b89563b0aa31a566 SHA-256: 093bca1027f5b75666b59028a4779526680c425c389a8806c8825926b0c11270
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a search query, likely intended to trick users into clicking on the embedded malicious 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 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://gimoguvi.ru/award?keyword=life+cycle+of+puccinia+graminis+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413005/normal_603d127dedc0b.pdfIn PDF document text
    • http://keepmaxi.space/558662195461yqps.pdfIn PDF document text
    • http://ihsteam.ru/dosetikomolefagekegkp70e.pdfIn PDF document text
    • http://fit-italy.space/basotho_clansqeaze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402963/normal_5fdca58d3b3a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_600ae8daa7435.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/338547203263pcik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_6029923b5c589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470040/normal_5fd3bcb3d53f9.pdfIn PDF document text
    • http://seplafond.xyz/jakajeso592o1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450356/normal_6021bb5749284.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f25d2a-fbd7-4df4-bf5c-0b0ee30c735f/who_hurt_the_little_girl_in_big_little_lies.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/70060141064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958ff6b4-071a-46db-b49c-c467eb616feb/is_hunger_games_mockingjay_part_2_available_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/15363330755.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/coliform_bacteria_meaning_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e09e6fe4-1ccc-4b0e-8424-041af288cbfc/53365433356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e08e41-82c2-4281-9514-6888f6bf85f0/vaxomofumamuguxopodagasi.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/6829336968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e49735-3d0d-4ed4-ac26-2b5e8ecdc208/furejepexubefexixizase.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_off00011953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11953 5516 bytes
SHA-256: 1dd92cced4eac7269fc208f10e86b09c85f23cde5d537c4c105a092488edb640
font_01_sfnt_off00012c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C12 10488 bytes
SHA-256: 68d6a4db49d1f8420903cd525653d047ee0b677dc1e128e489423ad21bb62446

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