Malicious PDF — malware analysis report

Static analysis result for SHA-256 c333a2bf06b93e44…

MALICIOUS

PDF

98.5 KB Created: 2021-04-12 02:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 03b238d86eeff63f69def8e9ea9bb25a SHA-1: 2d714248a2f069afa069f3b7cdd19dcab14701b7 SHA-256: c333a2bf06b93e44e5b9e6066bcd21454f90459aa623a3f5cd682c7b14426276
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The presence of external URIs and link farm heuristics suggests the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/strik?utm_term=allpowers+20a+solar+charge+controller PDF link annotation
    • http://ccckkkkk.space/rebogubunisuwnqt1x.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/why_did_finnick_leave_beetee.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/cervical_disc_bulge_exercises.pdfIn PDF document text
    • http://wugedasogulal.iblogger.org/asus_ac66u_firmware_aimesh.pdfIn PDF document text
    • http://kegujusotuk.iblogger.org/silavofanenisodoga.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/lonely_planet_turkey_free.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/the_lively_art_of_writing_ebook.pdfIn PDF document text
    • http://nominasacra.ru/invertebrates_and_vertebrates_lab_reportw7dy2.pdfIn PDF document text
    • http://artdebug.site/best_booster_seat_safety_ratings7j9m2.pdfIn PDF document text
    • http://vorasim.iblogger.org/zexetagevo.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://yildirimotobursa.com/cuanto_mide_1_metro_cuadradoy3yz5.pdfIn PDF document text
    • http://qrastenmap.online/daily_english_speaking_sentences_with_urdu0eaf6.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/xisilekoxaxemerewigoxole.pdfIn PDF document text
    • http://trysoda.club/gajevazadepmwo16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_aa108d1fbb594d08b7eb4ff711c90312.pdf?index=trueIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_59b1e809f06d4a36b87dc53174fdab75.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_3a9d83bc496e414bbae4c0dec622746f.pdf?index=trueIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_31f4afbd6b1f4b8cac10fdc82fc9286d.pdf?index=trueIn PDF document text
    • http://dojeranorered.epizy.com/44194344459.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAD 3240 bytes
SHA-256: 7b93194011bf482908535b60b38abbea4a3c638a909bc385ab9132d1cdbb6a6c
font_01_sfnt_off00012a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A43 5548 bytes
SHA-256: 1d6897b68a92ccac235a2bcc456926d467ffc71b6f77af39df8f435d9ad7c9f4
font_02_sfnt_off00013d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D35 11776 bytes
SHA-256: 64a622269afbd696b723e5fc32349a043cab8aa9eeb9e2127a1f0a34cc08452f
font_03_sfnt_off0001659f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1659F 16336 bytes
SHA-256: 2bbb67e629083a5a4e1b43344f0616346f348333dd3b91c288594715c81f48a7

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