Malicious PDF — malware analysis report

Static analysis result for SHA-256 b164a42b8eaef7c2…

MALICIOUS

PDF

84.8 KB Created: 2021-03-21 11:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2926d55c1ee2c6ecb7a8819dc94771d6 SHA-1: 0e22b7dee64a132866980739b75529c715624473 SHA-256: b164a42b8eaef7c27f467eb5c618b712639ae90bbfd5e2aecb737b50d614fd99
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document body, though heavily obfuscated, contains text related to 'energia eolica offshore pdf', suggesting a lure to make the user believe it is a relevant search result. The embedded URL points to 'bologen.ru', which is likely part of the phishing infrastructure.

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://bologen.ru/award?keyword=energia+eolica+offshore+pdf PDF link annotation
    • https://cdn.sqhk.co/naziwixolagu/Yigzph3/rekuwid.pdfIn PDF document text
    • http://world-wildshop.com/does_tricare_cover_prenatal_massage1fi2s.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/kicgeaB/evaluating_algebraic_expressions_grade_6_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/jihhfih/58299895558.pdfIn PDF document text
    • https://cdn.sqhk.co/sufajezugi/RSgjhby/57760315812.pdfIn PDF document text
    • http://telgrm.site/jemuzunaluvarumobuotffl.pdfIn PDF document text
    • http://snt-br.ru/30397082362f0sip.pdfIn PDF document text
    • http://1xbet-football.fun/what_jobs_can_you_get_with_a_visual_communications_degree0xe3v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_604833059910c.pdfIn PDF document text
    • https://cdn.sqhk.co/xurinuwame/hadgjc5/92676878239.pdfIn PDF document text
    • http://idealica-italy.site/dezugaligojiwaril0hymj.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/Ms73gcJ/forenugenevemefumulibafij.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefoveniri/vhc0Q3X/sukedibokigud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_6026eada5b5c8.pdfIn PDF document text
    • https://cdn.sqhk.co/fijiwomeza/hpehdOH/47493803907.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/1518c6f2-423c-48cd-84c8-bad870b7c042/macmillan_mcgraw_hill_treasures_kindergarten_activity_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8992a837-5a98-4451-9719-fef2ec32fdd7/baby_bjorn_travel_crib_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2e941a-e3e4-4a8f-b763-abc94b138290/4th_grade_math_curriculum_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b0fb4c-fc20-4ceb-9658-ef480c78d9cf/riludisopikinexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c7c288-f89a-4fbd-88c1-e95a9290efd6/zobusiruluvejurijuluvi.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_off000107c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C3 5376 bytes
SHA-256: 70aa340f971edebfcdb0f449686f42f63474c84b53b536d31a65f4a302abe4e5
font_01_sfnt_off00011a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A09 14228 bytes
SHA-256: 4f81e8f76e61c9ac1d06ac0612cf3b6806aa746881d2aba89de0f8dcb4cbc857

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