Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d0375fd7e57db7…

MALICIOUS

PDF

88.7 KB Created: 2021-04-21 22:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6d24425151adfa4b25bc74e958f3ad10 SHA-1: 2ab0d5dedafb26db4ce6e9b37fd21e186607603e SHA-256: 04d0375fd7e57db77c61eca396c0e8ecd72ec072809163d634201b9fa245b21e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for link farms and phishing lures. Heuristics indicate a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', suggesting the document's primary purpose is to redirect users to potentially malicious or scam-related websites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://ponafet.ru/strik?utm_term=fly+fishing+bait+for+bass PDF link annotation
    • http://gixuloponij.mygamesonline.org/bus_eireann_route_32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5fd112e5d9388.pdfIn PDF document text
    • http://nextauto02.ru/sony_bdp-bx59_no_soundv1nrx.pdfIn PDF document text
    • https://vimawagugagepa.weebly.com/uploads/1/3/4/7/134732412/bawegezikigutek.pdfIn PDF document text
    • https://jodatonibidoxej.weebly.com/uploads/1/3/5/2/135297120/2cdb4ba543a855.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/yard_machine_lawn_mower_wont_start_after_winter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5fd80e3b9f6d5.pdfIn PDF document text
    • http://theraisins.pro/biological_factors_psychology_definitionei9np.pdfIn PDF document text
    • http://iminn.ru/statistical_learning_of_language_definitionjfu29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464330/normal_5fedfa6d038a6.pdfIn PDF document text
    • http://vidclips.design/17027219641zuja2.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/pioneer_ductless_mini_split_inverter_air_conditioner_reviews9hd2l.pdfIn PDF document text
    • http://lebofawudire.mygamesonline.org/income_tax_calculation_2020_19.pdfIn PDF document text
    • http://leafester.online/xedamijeledefa43uyk.pdfIn PDF document text
    • http://wssummer.space/clinical_sports_nutrition_4th_edition_downloadnewvo.pdfIn PDF document text
    • http://pycnidwzxc.info/writing_samples_for_middle_school_students22e7u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384828/normal_5ff1494730482.pdfIn PDF document text
    • https://jazolesapixol.weebly.com/uploads/1/3/1/4/131453041/705dcd.pdfIn PDF document text
    • http://vittorguxx.site/lulemamasebejogajulebeg9x01i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_872e3e1311ad470493b6021b400a84a2.pdf?index=trueIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_fe7102e63ac34eb09553f8cb0bff969b.pdf?index=trueIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_424b8f699bef4a5bb072de3e8a0ae8a3.pdf?index=trueIn PDF document text
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_bc6fb757e539440a9ccada1867f0ef66.pdf?index=trueIn PDF document text
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_4d51a3dd649644598dbb679ee2a67ed5.pdf?index=trueIn 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_off00011e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6D 5224 bytes
SHA-256: f6cefdc4d7815d5ce19e174ae92844374de045399213c07de020b31d18b360ea
font_01_sfnt_off0001303d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303D 10532 bytes
SHA-256: 6a08dfba83352a5b1b81627c06f2c8cc06c8537cc3252f2a91ad0bc197e1d750