Malicious PDF — malware analysis report

Static analysis result for SHA-256 befadf08f8020acb…

MALICIOUS

PDF

62.4 KB Created: 2021-06-06 02:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 44c5028f1b08397291cbd7b567b356ce SHA-1: b39d32fe5d7c9c48cc251e062c6e781fa836b10c SHA-256: befadf08f8020acbae601607745a406de3daad5a4460419d9f7458bf34b7d532
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains or are part of a link farm, indicating a phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8458

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://archism.ru/pbw?utm_term=17.2+fossil+fuels+worksheet+answers PDF link annotation
    • https://vizokajobekaxa.weebly.com/uploads/1/3/0/9/130969885/towaxasakuge.pdfIn PDF document text
    • https://vonebofakakare.weebly.com/uploads/1/3/1/8/131856314/0b365dd.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/ccf67731-5096-4b51-a0fe-966e3f9e533b/latixadefitekex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/780342d0-1ed7-468b-823c-8a06251258ef/blender_character_animation_tutorial_beginner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f24626-5ee5-4234-b37d-5ea647028a76/diary_of_a_wimpy_kid_the_long_haul_full_moviedaily_motion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc8e69f3-8f33-4fee-80c3-655850eaf0e9/multiplication_worksheets_for_grade_1.pdfIn PDF document text
    • http://neruwuk.pbworks.com/f/printable_calendar_2021_may_through_august.pdfIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/144473745/best_photo_collage_software_free_download_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008ebd97-30c0-447a-874d-ad8aa7538d07/what_causes_a_samsung_refrigerator_ice_maker_to_freeze_up.pdfIn PDF document text
    • http://nigezid.pbworks.com/w/file/fetch/144424428/kr_gopalakrishna_engineering_drawing_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a34d1cc-f761-4c16-9b70-a49585dc8ded/67527917823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2747915-980e-4d6b-982b-9cd691b0ff03/kekitijuworazetodege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe026c6-93f1-4a71-97dd-d61c4b630fd0/tekafelujukol.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/f/joe_pass_jazz_guitar_method.pdfIn PDF document text
    • http://xewubamefa.pbworks.com/w/file/fetch/144648804/wafeluvoxamagozem.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/90366863767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0913be78-a0c0-4961-9b95-3210db924043/a_classical_introduction_to_modern_number_theory_ireland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aca8aae-11fb-4e6f-98e8-8fe8c201a227/vomus.pdfIn PDF document text
    • http://zeladejan.pbworks.com/w/file/fetch/144470391/el_regreso_del_caballero_de_la_armadura_oxidada_capitulo_5_resumen.pdfIn PDF document text
    • http://pajinap.pbworks.com/w/file/fetch/144673014/12214794111.pdfIn PDF document text
    • http://munonoraze.pbworks.com/f/pukurudu.pdfIn 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_off0000c61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61F 5212 bytes
SHA-256: db000d34f69c9dee011b9cc0898ce6d7944218bead7a294b7fab776d8f9b4f1a
font_01_sfnt_off0000d7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FE 10228 bytes
SHA-256: ebaa84f04de90030de921e820b12b3f58c661d037a041105f4b3eb4a000c57c8

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