Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c59a269c0d2e55…

MALICIOUS

PDF

81.4 KB Created: 2021-03-29 21:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b7dd6e93bcaef1c60678806db82eac73 SHA-1: c4f8988549e2269518b60dd272e30cded1588237 SHA-256: d2c59a269c0d2e558c19431a8e7d9b16a4a1336716e44c6ecd19a34e6167c7e1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'fokemale.ru/award' which is flagged as a potential phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting an attempt to obscure malicious activity. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirection to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/award?keyword=oxalate+diet+pdf PDF link annotation
    • http://winovigamaj.mygamesonline.org/65437150320.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/around_the_world_in_80_days_chapter_wise_summary.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/punawenijopewusosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471711/normal_604cc9898f404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_603abb5f12f26.pdfIn PDF document text
    • http://jojazinex.mygamesonline.org/short_play_scripts_for_high_school_students_free.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/66305467003.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/free_download_mathematics_books_for_class_10.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/janelixojos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_60141d4b72528.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/automatic_gear_shifting_mechanism_in_cars.pdfIn PDF document text
    • http://zanodopowe.sportsontheweb.net/72811754754.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_9b56165add8e461787de98fb07685128.pdf?index=trueIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/harry_potter_8th_book_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a44750-b43b-4c63-a971-ac5fd0516322/23458408889.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/shackled_city.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439da9b4-1ab2-43fc-8dcb-e61f712db56e/logic_pro_x_10.5_requirements_mac.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/nutaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/976565ff-9803-4101-834d-7400a44be6ac/ib_physics_ia_rubric.pdfIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_936363a66f9b427d8341467c4de12e00.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4386f5-696a-4952-83e4-43698aadbe7f/ps4_eject_screw_size.pdfIn PDF document text
    • http://jurizamumi.myartsonline.com/bixoruxizirevenazegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470d0e2e-1a35-4a88-9d79-fd1f9c0ff7cc/how_do_you_label_area_of_a_circle.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_32039184f8ca4844b6d539807311231a.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_off00010160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10160 4856 bytes
SHA-256: 263ce133a453aca757bff162f31584a612ad83388dbdaf2557d53c84065b90e8
font_01_sfnt_off00011202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11202 11356 bytes
SHA-256: 45a875f0f2d2b5c97ed43b4411f477eac23d36d3b33b5f0f7f909c9f0825790b