Malicious PDF — malware analysis report

Static analysis result for SHA-256 af49ad626d70e472…

MALICIOUS

PDF

81.0 KB Created: 2021-04-09 16:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6c5f0c4150eed646efa2e4f9bc5747b SHA-1: dae5598bb9b86f7e19b9e0076cd5efc4c59929bb SHA-256: af49ad626d70e472192b56fa0680d24c890ef8c9b4de5e92571f302ae754499c
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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=do+you+listen+to+music+while+cycling PDF link annotation
    • https://ximewenidurap.weebly.com/uploads/1/3/4/6/134651426/6758447.pdfIn PDF document text
    • http://presalle.xyz/rejevowodubali4x15a.pdfIn PDF document text
    • http://xetorobexojukas.22web.org/18807978046.pdfIn PDF document text
    • http://instapriz.website/39569662896v56fc.pdfIn PDF document text
    • https://duxudalo.weebly.com/uploads/1/3/4/8/134866109/jedafapuvapowaku.pdfIn PDF document text
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/7ed8e5723aa.pdfIn PDF document text
    • http://select-get.top/kitchenaid_gas_range_replacement_partsqiaqh.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/xevamovi-risovilojo-jilot-kufatirud.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/nepuf.pdfIn PDF document text
    • http://bizuzagewad.iblogger.org/61155430075.pdfIn PDF document text
    • http://antileqphh.site/plate_tectonics_free_downloadaicac.pdfIn PDF document text
    • http://pochta-24.cc/gukapavovug2pemn.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/f3fee2a4-155e-4986-b73f-6da96d760a16/pobodizonabima.pdfIn PDF document text
    • http://vizepojuduw.rf.gd/wapiwurademolozewimenimi.pdfIn PDF document text
    • http://revasaxoz.epizy.com/cuisinart_burr_grind__brew_dgb-700bc_parts.pdfIn PDF document text
    • https://c7e723d0-7712-45a3-a8dd-8d8935e7c5e2.filesusr.com/ugd/c4f451_deed3a7cda294fac8931cdcfea0ed117.pdf?index=trueIn PDF document text
    • http://bebakujudofofel.epizy.com/ridunetawowenefu.pdfIn PDF document text
    • http://bupulifiso.rf.gd/73363145571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a82ae06-ec26-46b2-89b0-5a8f6239e466/savenujikolawadafedopix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c271d6fd-68cf-4e5e-93da-2ebb865fcd7d/how_to_write_a_text_dependent_analysis_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf30005-c10a-40d1-966a-d9edeb679898/alveolarization_phonological_process_examples.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_1e6f398c3be44028b3e5d96fbdd8016b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f7d353-b35f-4ee2-bcf7-4622f3eabdc6/interview_questions_and_answers_for_senior_leadership_positions.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_off0000fe83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE83 5100 bytes
SHA-256: 94458de094155d489f255e72bc2188c9d42d8967136f3a48d782b06d57973829
font_01_sfnt_off00010fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE1 11552 bytes
SHA-256: 5c220aa0ca8a0331230fb822a40472b093337915b299e45aa8a0fcdc33acb525

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