Malicious PDF — malware analysis report

Static analysis result for SHA-256 be23e156e6e88499…

MALICIOUS

PDF

100.8 KB Created: 2021-04-02 00:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fff5cdc4182ab871d7d74319919a172 SHA-1: 7054e3856323bc50780fbb0a4337a8f14365dabc SHA-256: be23e156e6e88499eb7d3a2484f6450f09b775a6cfaf0eca1d3587fc346d5580
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to harmful content.

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://soxebez.ru/123?utm_term=earned+value+management+reporting+requirements
    • https://cdn-cms.f-static.net/uploads/4388283/normal_6056759aaa8b3.pdf
    • http://fegokodelaxen.scienceontheweb.net/27784044699.pdf
    • https://cdn.sqhk.co/xezalagefog/6higiZb/free_bootstrap_checkout_page_template.pdf
    • https://cdn.sqhk.co/rerunagakiz/iifGtpP/block_master_for_minecraft_pe_mod.pdf
    • http://zikewexer.scienceontheweb.net/nejiwofasezemopodomelo.pdf
    • http://tobufupevujuma.mygamesonline.org/sirozokojedodobu.pdf
    • http://pimifawimonidij.mywebcommunity.org/age_of_exploration_vocabulary_worksheet_answers.pdf
    • https://cdn.sqhk.co/kufejagefep/vjdktEO/mx_player_hd_video_app_download.pdf
    • https://static.s123-cdn-static.com/uploads/4530171/normal_5fe0e8beb0215.pdf
    • http://joxezorov.mywebcommunity.org/ccna_security_download.pdf
    • https://static.s123-cdn-static.com/uploads/4393925/normal_6001f44f7a3f6.pdf
    • http://xapiduxirob.mywebcommunity.org/8403281053.pdf
    • http://lipuwisapi.mywebcommunity.org/mtd_yard_machine_5hp_chipper_shredder_manual.pdf
    • http://wamuwosola.mygamesonline.org/fofelopusasizokikugu.pdf
    • https://cdn.sqhk.co/bulelovuroga/cc7geNU/pinata_smash_cake_ideas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_152632596bb040d397cf35eeb2b2dd20.pdf?index=true
    • https://s3.amazonaws.com/bevarolimesale/bisphenol_a_sources_toxicity_and_biotransformation.pdf
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_540d17cf2be840cf92de2c18ee33292c.pdf?index=true
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_26657bdfefef4669b6b0fc0b235b0209.pdf?index=true
    • https://s3.amazonaws.com/satudifin/nalidozegasubotud.pdf
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_ca8d77fe16bc4db28012e02b5c771fbc.pdf?index=true
    • https://s3.amazonaws.com/zulezov/39195970986.pdf
    • http://fotizojorirepel.onlinewebshop.net/ankle_fracture_rehab_exercises.pdf
    • http://niwurekatexo.atwebpages.com/ncert_solutions_for_class_11_accountancy_download.pdf
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_6f99486800ec44bf8d2b0a4516ea3649.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_off00014a2f.bin
8140dd0068c129f513f720c1db334c959163eb1281dcd2796e1baea305b5f9d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A2F 5424 bytes
font_01_sfnt_off00015c88.bin
7331e11788e4bac790fcea90d72a8b676e920e3be38582da0bf43e4a3f832089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C88 11992 bytes

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