Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc808290697e367…

MALICIOUS

PDF

87.8 KB Created: 2021-03-29 15:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: def151b4e55f6b6e56f3c651bd30e230 SHA-1: 55075cf6541753b41676b624a400bf2f10bf9c97 SHA-256: 2fc808290697e3679c6c40e708311bdb731fd78278900ffd9c2df2453b8fb4f9
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 0.9993

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://jumiwimov.ru/strik?utm_term=this+bridge+called+my+back+writings+by+radical+women+of+color PDF link annotation
    • http://kalavar.xyz/water_park_slidesm6yua.pdfIn PDF document text
    • http://zusazibob.iblogger.org/what_were_the_czars_of_russia.pdfIn PDF document text
    • http://govnosiakxws.online/cfa_level_1_book_amazondypuc.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/hLjjm3n/gegelovumijaz.pdfIn PDF document text
    • https://cdn.sqhk.co/xewebevij/G5Zi7ij/merge_snake_mod_apk.pdfIn PDF document text
    • http://fridgeservice.ru/para_que_sirve_un_portafolioue42n.pdfIn PDF document text
    • http://blancop.xyz/rusuxoruutswt.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/yBQvOha/internal_calibration_certificate_format.pdfIn PDF document text
    • http://luzibis.iblogger.org/edtpa_task_3_assessment_commentary_examples_elementary_math.pdfIn PDF document text
    • http://ziwixan.iblogger.org/66400689023.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/hcMEiaQ/nivepaxukokikunug.pdfIn PDF document text
    • http://wekeb.space/how_to_install_audio_driver_manually_windows_10s9olq.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/Hbhijih/75507788325.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/bfc0ecc3-8fd1-4f92-b509-18d8eeb772dc/zidizewugatorididox.pdfIn PDF document text
    • http://jetizugig.epizy.com/rotimufe.pdfIn PDF document text
    • http://magomodatibotu.epizy.com/gopaxulag.pdfIn PDF document text
    • http://mivajodeki.epizy.com/56920140434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc045f1d-3b46-4b4e-a4d0-6a882aafa40b/simple_machine_learning_programs_in_python.pdfIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_d5cf4b4e6af74e1b87a451db72b7c71d.pdf?index=trueIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_5507e39967ef4ae39cbf698046ef01d1.pdf?index=trueIn PDF document text
    • http://torumaxot.rf.gd/31179699365.pdfIn PDF document text
    • http://nawevuf.epizy.com/kipelimokixazekogek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c24a84-647e-4a38-9552-eaa4512d2a4d/used_john_deere_345_hood_for_sale.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_off00011413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11413 5784 bytes
SHA-256: bc19b5c1b0f64df874ee5d05a10d1e119d1696da6aeb9130a3b05fccf56ebe5e
font_01_sfnt_off000127b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 12144 bytes
SHA-256: 31eed506de31144f23d4f70a5730c7a715aad0ffae67a874a42e279a3aa9cbe5

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