Malicious PDF — malware analysis report

Static analysis result for SHA-256 2162794ce5f240b8…

MALICIOUS

PDF

94.3 KB Created: 2021-03-22 19:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f633cd60e688cfc1c1201a96cd17525f SHA-1: dea3c2733ccf5d92508325aa4e5f2fa6853d220c SHA-256: 2162794ce5f240b887cc3668ec43547473bfce62e514fb6abc7448a8614bb69a
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 0.9998

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://bologen.ru/aws?utm_term=a+streetcar+named+desire+national+theatre+synopsis PDF link annotation
    • http://fedezin.scienceontheweb.net/property_and_casualty_insurance_license_exam_study_guide.pdfIn PDF document text
    • https://momiweporav.weebly.com/uploads/1/3/4/7/134745900/zapatozoxewi.pdfIn PDF document text
    • http://vertigoa.online/25121694856bgbep.pdfIn PDF document text
    • https://vepezoroz.weebly.com/uploads/1/3/4/6/134605761/643656.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • http://norasuzajo.mywebcommunity.org/botanical_names_of_plants_in_tamil_and_english_download.pdfIn PDF document text
    • https://dowibowaxetejoz.weebly.com/uploads/1/3/0/7/130740522/naxumiwuworixi-norajewovi-zofidomad-durukif.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/cLidhfA/30469811551.pdfIn PDF document text
    • https://zilexewutefak.weebly.com/uploads/1/3/4/6/134608169/xedafotofepusawekapo.pdfIn PDF document text
    • https://cdn.sqhk.co/jafakitiw/hihdjjg/black_beatles_clean.pdfIn PDF document text
    • http://mebelrostov.ru/times_tables_worksheetv8e7m.pdfIn PDF document text
    • http://daravto18.ru/the_merchant_of_venice_book_download9ha1x.pdfIn PDF document text
    • http://avbox.org/segumebezuni24r19.pdfIn PDF document text
    • http://meblik.su/what_are_the_seven_gifts_of_the_holy_spirit_given_in_confirmationkuser.pdfIn PDF document text
    • http://topsalon.xyz/proshop_led_par_64_manualr6nq7.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/5e93ec8d-6b12-4094-8115-02a818dee354/68430276271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaee7058-5728-4f98-8145-9e77fdcf1d56/akg_p420_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c76a29-78c2-4bcf-a21b-627f1bf86499/94759699803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e939e3f9-0377-46cf-b5a9-5c7515e95a27/sufawosaruk.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_off000131fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FC 5404 bytes
SHA-256: e05d62c619e15db1967329cadc243a27d4da34029445b8c8dc054a1c0d61fa02
font_01_sfnt_off0001443a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1443A 11848 bytes
SHA-256: d9fa49d38d4b982626fd3a022c1bb7f0a4a6690073dc640b2b8026dfc3d40481

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