Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccd229df04d477d…

MALICIOUS

PDF

94.7 KB Created: 2021-03-18 11:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6113682905e5a5edea535f650c422ff8 SHA-1: 705016c34fa0b98d1a959ae6859c8b32c10d261b SHA-256: 2ccd229df04d477d4b9752421e0b8befadb6d6dbe9b0d6c594fb37c3e3432ebe
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on directing users to external sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous unknown reputation URLs suggest a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload or phish for credentials.

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://seumenha.ru/strik?utm_term=how+to+adjust+pressure+on+remstar+cpap+machine PDF link annotation
    • https://cdn.sqhk.co/pivokazi/Njahhog/12380625422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_602585b883e41.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/92238509478.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/hlge5ib/85660772162.pdfIn PDF document text
    • https://cdn.sqhk.co/litopozuf/aaSjijj/transfer_news_today.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/TZjjicb/joy_octopus_watch_v2_review.pdfIn PDF document text
    • https://cdn.sqhk.co/subogutaze/idje3gi/english_bible_application.pdfIn PDF document text
    • http://numulul.mygamesonline.org/lista_tascon_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_6033c6be274e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_604e1094d1ac7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_c2ca9c724b1e4974ab0321ea02b709df.pdf?index=trueIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_b61ef5f7c4c2456f908b06dacc19470b.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_88351988561c4c29ba91de8da56954ef.pdf?index=trueIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_e7decd05c6804735ae2abe5b872edcfe.pdf?index=trueIn PDF document text
    • http://bavevex.onlinewebshop.net/95084243802.pdfIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_307418f43784447f86c86fb13269ac1a.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_off00013536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13536 5412 bytes
SHA-256: 6e24384338bb5ee90f28b6a003f5747b327f2a1e4a6acb5e557cac347a47666a
font_01_sfnt_off00014785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14785 11340 bytes
SHA-256: ac670e419d4b2707268554887583015b622c67ab2a12fbfe49a8be9360b2f95e

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