Malicious PDF — malware analysis report

Static analysis result for SHA-256 b918e3d047f4ad9e…

MALICIOUS

PDF

81.6 KB Created: 2021-04-05 21:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5e57670f5f6c8966f87ae30a54c26c78 SHA-1: cf5a09af72fa4e5f039bc3992632329449b5443f SHA-256: b918e3d047f4ad9eb4655dd10d137ba69c1396bfec08a0382687bc4bf3504a38
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or Trojan threat. The document body, though heavily obfuscated, suggests a lure related to an 'Allianz overseas student health cover claim form'. The presence of numerous external URLs, including one pointing to 'vilenefex.ru', strongly suggests this document is designed to redirect users to malicious sites for credential harvesting or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://vilenefex.ru/123?utm_term=allianz+overseas+student+health+cover+claim+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422382/normal_5fe267c7a4219.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/ggphjSl/cannon_shooter_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_60183133ccab5.pdfIn PDF document text
    • http://palogaza.sportsontheweb.net/cell_cycle_book.pdfIn PDF document text
    • http://fozivot.mypressonline.com/51584900191.pdfIn PDF document text
    • http://pupigojoniru.mypressonline.com/chamakam_tamil_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/ibyiahe/57656887274.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/dojegopodekumama.pdfIn PDF document text
    • http://janipuwibir.mywebcommunity.org/sibopetogogatago.pdfIn PDF document text
    • http://xibiselid.medianewsonline.com/neet_answer_key_2020_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_606ae5551d8dc.pdfIn PDF document text
    • http://sugalomiwuto.getenjoyment.net/60656984861.pdfIn PDF document text
    • http://kimiter.medianewsonline.com/nozaxanadawejesikiziweg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445118/normal_6015c28df0c24.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/gfZ4wjb/nokop.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/dhciajb/bet365_login_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/hahghdF/background_image_for_photo_editing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_60118a91d2cf4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_30884b7273db4600af1cc2418c3407af.pdf?index=trueIn PDF document text
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_78c98aebdb624921a4add55ec39250e3.pdf?index=trueIn PDF document text
    • http://vimixof.onlinewebshop.net/marathi_famous_books_download.pdfIn PDF document text
    • http://samesesodore.onlinewebshop.net/muboki.pdfIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_309c3b82cd844d9dae7e48ea2266e7ec.pdf?index=trueIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_8ad27c8548614e7da883159c5372a177.pdf?index=trueIn PDF document text
    • http://wadoromutisagar.myartsonline.com/green_smoothie_revolution.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 5360 bytes
SHA-256: 8d838804d235ef12df27cf6698ef7c4368c22740048b8867dc0a607998fefd28
font_01_sfnt_off0000fdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF0 10360 bytes
SHA-256: 7703cc0e49dd4e4f30b2a718ec1aa292774186e91cb76e260b8bde8343d96487
font_02_sfnt_off0001217c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217C 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

Open this report in the interactive analyzer, or submit your own file for analysis.