Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a768c0bf9406ad…

MALICIOUS

PDF

78.6 KB Created: 2021-03-18 16:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 459605bcfbe407b49d904d36641be0f0 SHA-1: 95e4e7b844f393af253e7730e465a24e50446bd3 SHA-256: 79a768c0bf9406ad948be6fe5887863a528bc91af1c5e2c25dcb862ea93efe7d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing users to 'fokemale.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous disposable domains for hosting similar content, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

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=berliner+platz+2+pdf PDF link annotation
    • http://sijubuwejipamun.mywebcommunity.org/does_roku_tv_support_airplay.pdfIn PDF document text
    • http://subakegewoje.sportsontheweb.net/alberto_moravia_agostino.pdfIn PDF document text
    • http://tonilakifak.mypressonline.com/jixamuzopeworazowepeneni.pdfIn PDF document text
    • https://besajiti.weebly.com/uploads/1/3/1/8/131856076/bawaxegi.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/wererogegij.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/larson_algebra_2_common_core_teacher_edition.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/masters_of_doom_tv_show_cast.pdfIn PDF document text
    • http://miwuzobi.sportsontheweb.net/data_structures_and_algorithms_in_java_for_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabaxaroxofujo.epizy.com/safobimakitabexojavura.pdfIn PDF document text
    • http://supetok.rf.gd/78046593810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48108209-cb91-41e9-a901-bae81fb06c3d/power_electronics_music_documentary.pdfIn PDF document text
    • http://pomedunud.epizy.com/moxujopozozikopozuxaxegok.pdfIn PDF document text
    • http://titugol.atwebpages.com/59391419003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5245543-e8a9-4ab0-b005-a17f5ed44fd6/mama_do_you_love_me_book_quotes.pdfIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_9bc3ec552b454217bd0d5782db42d11c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f91ac1-659d-49f0-8111-e0fb56db9294/60266341942.pdfIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_92317168e3d548b599ebcb11e8c9b364.pdf?index=trueIn PDF document text
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_9dc907a66f76494bb1bda80208839859.pdf?index=trueIn PDF document text
    • http://wonanikapudidak.atwebpages.com/32591106682.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_15159a66767941e5b09d5b12adaf33dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84bc82a-e947-4343-8049-e31985af801e/fenoguboxovulujifawade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a27f2c0-2d81-4719-9176-596d859aba17/how_many_calories_in_black_hazelnut_coffee.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/47038473010.pdfIn PDF document text
    • http://robexede.rf.gd/brake_technology_handbook_breuer.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_off0000f629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF629 5088 bytes
SHA-256: 89ebcc36ea3335e4544a2447310b622941913cf4c24dc7b5217162e464c398e1
font_01_sfnt_off0001078f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 11460 bytes
SHA-256: 29efd270fe38ae018efafc3c6622a82c7bb03212f22ed0de96ac10e9717d870b