Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c01061661d2b721…

MALICIOUS

PDF

70.1 KB Created: 2021-03-06 08:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 043367fd703f478df850292138861784 SHA-1: b3c4b284821c0bb809652290ccdda6fa6cb8c5a4 SHA-256: 7c01061661d2b7215bd75ce1c6fd1985fdf9fe22d0a91ee4b44975bc7e233ef6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a Cuisinart manual, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://mezovuduw.ru/aws?utm_term=cuisinart+chw-12c+manual PDF link annotation
    • http://eurofamily.pro/the_theory_of_island_biogeography_revisitedqtk7i.pdfIn PDF document text
    • http://nanolenka.xyz/can_daphnia_live_out_of_waterpfflo.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/99019824666g9j61.pdfIn PDF document text
    • http://boldly-grow.com/40404815620oz11l.pdfIn PDF document text
    • http://mainsale.info/cosmote_sport_1_guide0n7t2.pdfIn PDF document text
    • http://senteber.site/sato_cl4nx_problemsyn2wy.pdfIn PDF document text
    • http://akmurzina.com/wendys_french_fries_nutrition_information1dayb.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/1487451a-ad14-4aff-88e0-5dda2f108688/rojiragaxuma.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/adobe_photoshop_for_pc_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/css_tutorial_bangla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/801bbb81-af60-4191-968b-0980a69f57d2/wujivovijotefilef.pdfIn PDF document text
    • http://dirazonun.myartsonline.com/senior_systems_engineer_jobs_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1beb4bfb-5191-4ba7-bf20-f5180554f32c/audi_a6_c5_service_manual_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/63323062722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe9403b-2df6-4e87-9438-6e10922d0381/tuzitov.pdfIn PDF document text
    • http://baxewape.myartsonline.com/50476614749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a843a12b-fcd0-4a1a-a71a-1fd7523faf02/which_boletes_are_poisonous.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8e596d-5457-46c9-a977-cee20f891e16/41130866355.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/loduviseji.pdfIn PDF document text
    • http://rupesujutiwu.myartsonline.com/39687525461.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_off0000d6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B7 5252 bytes
SHA-256: a64b28d0bc58f760d4e223c18f00247e4c88db298d757a74cd47692a413ff34a
font_01_sfnt_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 10216 bytes
SHA-256: db6a4078025b89de079ed8a3c4ffb98c45b1df45f84d547e417eeff9041ed6e8

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