Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c431001fbd34e37…

MALICIOUS

PDF

74.3 KB Created: 2021-03-17 06:39:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 248721c3c6ce9a65c37992f326d6876c SHA-1: f8b6fb0bfff8ba2f27263397142877f9676ac932 SHA-256: 0c431001fbd34e37a2b03cc9a4a029d0c0de8741535f7d46654a84e2bc526370
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery attempt. It contains multiple external URIs, including one pointing to 'baarspo.ru', which is likely part of a link farm designed to redirect users. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be a precursor to an archive download, and 'SE_CALLBACK_LURE' indicates a potential callback phishing or tech-support scam pattern. No scripts were extracted, but the presence of external links and the overall heuristics strongly suggest an attempt to trick the user into visiting a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/wix?keyword=mililani+library+printing PDF link annotation
    • http://vavazexowupex.medianewsonline.com/abstract_nouns_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413368/normal_5ffe96337cb73.pdfIn PDF document text
    • http://kexumojazo.mypressonline.com/project_report_on_swot_analysis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fe49a85da004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5feef7d40a6eb.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/49987790565.pdfIn PDF document text
    • http://nakozek.mypressonline.com/horus_heresy_siege_of_terra_sol_system_map.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/wepunojetiga.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/a_view_from_the_bridge_quotes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467576/normal_60070404b0901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_600a698d25607.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/95937744172.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_c9c08c7e9ed34a9dbcf862178923baf0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/maforanubadasagodona.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/fijajug.pdfIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_9c9981e45f79461fbf6693b965cae620.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luropiw/android_radio_button_like_checkbox.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/glacier_bay_sink_template.pdfIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_29649c97834141c8886e50d2379489d0.pdf?index=trueIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_bb526b12ad454d48afa859eb3bc54eea.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_off0000e391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 5056 bytes
SHA-256: dabe31b5a0c49ebf449b1c45313e6ef382f68514cd7861cc664587c973f1f656
font_01_sfnt_off0000f4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 11500 bytes
SHA-256: 8e92028f18911d48532413b6ff0c899c228d5d90268ddcaa06cbf23209377dee

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