Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd39c7145efbebf…

MALICIOUS

PDF

83.0 KB Created: 2021-03-23 15:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 70e7dacb7ef1e29809f5635b84a2db4c SHA-1: 0615e60c79b18d5debb0b8bafe7b7c421bcc61a1 SHA-256: 6bd39c7145efbebf010fed4a224df6582191ef35d3756316125cbf9b04d0aa61
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded links are consistent with a link farm designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=swann+smart+indoor%252Foutdoor+wireless+security+camera PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371010/normal_602f518ad89b6.pdfIn PDF document text
    • http://lorem.space/black_and_decker_lst136_reviewwy11z.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/ghCaggU/fodigosofirigirifa.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/jojbhDr/chicken_run_locust_grove_ga_menu.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/10352049897g8rd2.pdfIn PDF document text
    • http://littlenat.space/sda_bible_study_guidex8nuq.pdfIn PDF document text
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/7814797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387433/normal_5ffa5fb6218f9.pdfIn PDF document text
    • http://nefozufovi.scienceontheweb.net/line_6_pod_xt_live_effects_loop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422368/normal_5fe40412d51ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480591/normal_5fcf5808b4ac8.pdfIn PDF document text
    • https://cdn.sqhk.co/xadopazo/SgcqUxn/e_m_b_reporting_system.pdfIn PDF document text
    • https://cdn.sqhk.co/vuveleni/1iiehjQ/shooters_world_precision_rifle_powder_review.pdfIn PDF document text
    • http://tozemudezajif.mygamesonline.org/diziler_kurallar.pdfIn PDF document text
    • https://mogisitubetaw.weebly.com/uploads/1/3/4/4/134496388/pugoko-gopimejo-wetiba.pdfIn PDF document text
    • http://tehnikator.ru/57228315934j0jnd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futikuzita.onlinewebshop.net/papigowowamek.pdfIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_0a3d3f90da674f47bb25920cac9ef3c3.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_cf88188f1c4b4963a6ee28861b44d879.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_f642b152b217427ca94082a7bf808957.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_off0001066e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066E 5420 bytes
SHA-256: 2a5862d819463f083fb8ab203d980093d4cb8ba33156f90812aee05fcb617ba2
font_01_sfnt_off000118df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DF 10848 bytes
SHA-256: 38f6ade3a5c38c9dd5f7b9255b8888ed34700b51b62001b705bccaef29942eba

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