Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a69c0a97c703be…

MALICIOUS

PDF

84.7 KB Created: 2021-03-30 00:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8577b4def32b727d24267aa00722e83 SHA-1: eb929464795ef7f861a2de564bdc47e9dafeee9d SHA-256: 12a69c0a97c703be58527d9c0a5b440563f91b86b6e2159ddb4115d395d24437
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary focus on 'https://zajinet.ru/wix?keyword=arkham+origins+trophy+guide'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the link farm structure strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://zajinet.ru/wix?keyword=arkham+origins+trophy+guide
    • https://cdn-cms.f-static.net/uploads/4501193/normal_600f9b373d6ad.pdf
    • http://bexukavinawexov.mygamesonline.org/bringing_them_home_report.pdf
    • https://xajasirofoxuki.weebly.com/uploads/1/3/5/3/135330212/5137833.pdf
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5fd84ef1de3fd.pdf
    • https://nozitobolilijaz.weebly.com/uploads/1/3/4/4/134473425/nezevulegeruw.pdf
    • http://mosomupusafebin.medianewsonline.com/14145441264.pdf
    • http://fekevopimibun.sportsontheweb.net/viwafidijojo.pdf
    • https://judaromoperojog.weebly.com/uploads/1/3/2/6/132681758/fafavasapidonatajum.pdf
    • http://finoginujowiwi.mypressonline.com/mirro_matic_4_qt_pressure_cooker_gasket.pdf
    • https://cdn-cms.f-static.net/uploads/4416144/normal_60527de4ec94b.pdf
    • https://tuwunujanopir.weebly.com/uploads/1/3/4/6/134617400/risugogag.pdf
    • https://cdn-cms.f-static.net/uploads/4443619/normal_600c238bbdd87.pdf
    • http://rupazaduxil.mywebcommunity.org/78623489547.pdf
    • http://tetizeniwa.mypressonline.com/wirenefetozodula.pdf
    • https://cdn-cms.f-static.net/uploads/4417537/normal_601e15dc1e183.pdf
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/sujafili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pijosufun.myartsonline.com/zoxilek.pdf
    • https://uploads.strikinglycdn.com/files/43c544be-2676-49ea-83e8-e8ac916443d6/vogexisujibedesenivuja.pdf
    • http://wumugajus.onlinewebshop.net/the_fellowship_of_the_ring_book_free_download.pdf
    • https://uploads.strikinglycdn.com/files/c99c56d3-dfe3-40a6-ae20-825a5fd4348d/dyson_cinetic_big_ball_animal_cheapest_price.pdf
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_51315c52a5df445ab3b566414843c0be.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8bc77a80-1188-4dba-82c8-932740e776b5/what_religion_is_your_bra.pdf
    • http://jaxunukologefis.onlinewebshop.net/xbox_one_dual_controller_charger_dock_with_batteries.pdf
    • https://uploads.strikinglycdn.com/files/29d5bae3-ca99-4ce5-84c2-19f0a0507088/how_to_service_an_insinkerator.pdf
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_5f56db089d2f4b05991bea5dd72e09d0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/62a719db-b854-4b97-9c3c-6fa052c52653/15706820805.pdf
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_4738184c56f1421a93efbe4dcad2bb05.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ac5.bin
bcbf853875004dd7890bd45946f4821e70fa60584f43e9df5704b2537a8816ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC5 5496 bytes
font_01_sfnt_off00011d56.bin
54d26397d78cf0fd2232ae5eb0595fb933fb12dae302c38b59c4c8c298f863f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D56 11212 bytes

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