Malicious PDF — malware analysis report

Static analysis result for SHA-256 242a328ee436f778…

MALICIOUS

PDF

121.9 KB Created: 2021-04-05 22:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9692daabde4c186b6b5218ee0478bf49 SHA-1: 25a467b3e51dad763e6b3793b73bfeaf9b0ced49 SHA-256: 242a328ee436f778957a379b0a346c2135548054b5a1b20b05270ee462c85ed4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 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
  • 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/strik?utm_term=deci+and+ryan+self+determination+theory+book PDF link annotation
    • http://copyrightnotices-form.com/taxofazobonibivowaronuzrcxtr.pdfIn PDF document text
    • http://umkatrade.ru/burunanajisuy8h4x.pdfIn PDF document text
    • https://dojosofezi.weebly.com/uploads/1/3/5/3/135390984/2064664.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/jgjBgeU/temple_spooky_jungle_run_oz.pdfIn PDF document text
    • http://newberginvestmentproperty.com/612528656900o7hh.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/hdohUHd/14450640529.pdfIn PDF document text
    • https://velaliwud.weebly.com/uploads/1/3/4/6/134644949/3773962.pdfIn PDF document text
    • http://freud.icu/2019_can_am_outlander_650_service_manualv2qfn.pdfIn PDF document text
    • http://greenbike.shop/vipawuzewof1p4e.pdfIn PDF document text
    • http://bestplacefor.rest/73004064983adli0.pdfIn PDF document text
    • http://fastnoutservice.ru/36194708431mj7m1.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/fd964c673f95bd8.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/igkDKVY/5995379526.pdfIn PDF document text
    • http://jumpfs.space/elite_mobile_notary_reviews8brvb.pdfIn PDF document text
    • http://fixmarker.fun/keximitilesisipezapewekum5qqvz.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/hedugca/4521990814.pdfIn PDF document text
    • http://healingtunes.ru/manual_calculadora_casio_fx-115es_plus3hf9a.pdfIn PDF document text
    • https://gebevomipo.weebly.com/uploads/1/3/0/7/130740462/2111194.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/ed7ede26-53a1-4494-9a9b-2a4aadd0fa92/first_aid_step_1_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0722e1cd-176f-41e9-9172-a389a105ef7b/1_of_4_kitchenaid_artisan_white_mixer_with_hobnail_bowl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0765b1-c247-4b85-a22e-45dd26ca4801/daganorixiwal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/964cc4e3-4b09-4272-bc53-100f8d88276b/berepixudokuzekibala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a6e2fa-0d6a-411c-b45c-ff9d6eb15933/que_se_le_puede_regalar_a_un_ahijado_de_confirmacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9c936f-768c-463f-80b1-5a8777c6e90f/569478778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac41b49-1b09-490a-9da2-260ee39d903a/chauvet_dj_4play_2_moonflower_light_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0eecbc-8bf2-49a6-be8f-41a38c1992d4/20842870503.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_off0001a031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A031 5568 bytes
SHA-256: 88d9f7a64bba472a143e125761c31266c5c2d42036310ba3a6ae5013d1800a2d
font_01_sfnt_off0001b303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B303 11668 bytes
SHA-256: 59fee137eb9183d4ddb734114fefbc0fe42e66715db58ec8d8ad53ef7897df97