Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e6d043a7db1a9f…

MALICIOUS

PDF

86.6 KB Created: 2021-03-07 02:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: af60d883bb4bfef0d73ab9b78be96c72 SHA-1: 74ec4cdd4820c7d64002a4895f295ad99e65386f SHA-256: 46e6d043a7db1a9f58c68d89b5d68888ef71580aab901d12bf95f0014498503b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on `https://ponafet.ru/award?keyword=frozen+juice+concentrate+instructions`. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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://ponafet.ru/award?keyword=frozen+juice+concentrate+instructions PDF link annotation
    • https://sozuxope.weebly.com/uploads/1/3/4/8/134873608/tituxige.pdfIn PDF document text
    • https://cdn.sqhk.co/dipopoji/j6ih3if/dezomujuxipawije.pdfIn PDF document text
    • https://fokifukamanur.weebly.com/uploads/1/3/0/8/130874497/vuduteba.pdfIn PDF document text
    • http://fabermanufacture.ru/45879922012ptgz9.pdfIn PDF document text
    • http://gnfcns.info/interview_questions_for_math_teachers_and_answerscr3xr.pdfIn PDF document text
    • http://the-job.ru/himnario_adventista_jovenes2hw9v.pdfIn PDF document text
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/088b03b.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/WEVjdJv/warship_island_arc.pdfIn PDF document text
    • http://cozyplacefor.rest/jajegipatasexabowokoraoub8e.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/badowodubo-mapujejem-fuwavumonolaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wikatamuk.rf.gd/ielts_speaking_test_cue_cards_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b866f6c-e100-4a7f-ab08-67da3e93ddf4/axial_scx10_iii_transmission_gears.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2716d5-8d29-49e0-905a-2a34de0c01c7/how_much_does_a_large_square_bale_of_hay_weigh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29574a20-412b-4452-8d84-15f0d500d950/kavukeleme.pdfIn PDF document text
    • http://vegozamefokim.rf.gd/dofeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502b395e-4aef-4734-a0d0-f1125d15673a/cuanto_1_metros_en_pies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f4c0c4-e1be-4d21-ac21-fb16739387b1/miller_syncrowave_180_sd_tig_welder.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_off000117ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AC 4844 bytes
SHA-256: b46738f6a9fd0be9ec8300f35cd4d990c4a7b271a90f7bfb8e62638099e5655e
font_01_sfnt_off0001283b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283B 10964 bytes
SHA-256: f781523c62345b1dace6f22c2c91c22f57fbf104011fe2485a33aeb863a93fbe

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