Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c83101192691ac8…

MALICIOUS

PDF

102.0 KB Created: 2021-05-13 05:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d61069c9324ac97598bd2fe30e8c62df SHA-1: 599be32d804d0e75ebac1ee0524866bad3e427eb SHA-256: 2c83101192691ac83433728524e067223289bccde105ce45ffef18b187c6d017
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://pelibifir.ru/strik?utm_term=hp+deskjet+6988+driver+windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418391/normal_5fceff592c89c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_604b6142b06ed.pdfIn PDF document text
    • http://blekrossi.ru/tinawukuxonujoto6md3i.pdfIn PDF document text
    • http://domobifotuza.sportsontheweb.net/hip_isometric_exercises.pdfIn PDF document text
    • https://kofukupapakube.weebly.com/uploads/1/3/4/5/134586312/lafitutem-satonare-dedorojipi.pdfIn PDF document text
    • http://micrometerdigital.xyz/benzyl_chloroformate_50_in_toluene_density3r1ya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490123/normal_5fd7ceeca6231.pdfIn PDF document text
    • http://znakomstva69.space/international_bill_of_exchange_templateqmrkj.pdfIn PDF document text
    • https://fojexoduzasob.weebly.com/uploads/1/3/4/6/134693365/1199255.pdfIn PDF document text
    • http://originalhallyu.com/46090280701zukmq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_602ec8835c7a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483361/normal_60187117c2542.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
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_930705f4d3174f5f877b3752a152cf9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f186b4-658e-4deb-8d3e-49a8b51e4cfc/m_audio_axiom_air_25_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6430a7-fccf-4854-a6da-06bbb57455a7/79705054138.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_bfc41fa4d2d84c5e88c8a89f58e5ed17.pdf?index=trueIn PDF document text
    • http://ratobewiwigu.atwebpages.com/how_to_program_a_charter_cable_remote_to_your_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5767d037-c109-4ff0-a37e-2648c1aa0753/ryobi_18v_charger_both_lights_flashing.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_2acf2c19afbd474a8771799a47f5a419.pdf?index=trueIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_7863458c5d124373a988a234173ba4f1.pdf?index=trueIn PDF document text
    • http://xomapagovujux.atwebpages.com/48808759431.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_off0001407f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407F 5448 bytes
SHA-256: 46d8b8a9fcbf2a835528a034c5b7d11b15ab2962afdc47f335eda433e2838310
font_01_sfnt_off00015331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15331 11748 bytes
SHA-256: 8c25ab8505f8d791580383c51db1e94aaa78fa42b1b657b927beb493ff81e1f6
font_02_sfnt_off00017a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A49 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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