Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ccb710e53330c9…

MALICIOUS

PDF

82.4 KB Created: 2021-04-14 20:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e94c744ee9579e2365a214e600f65098 SHA-1: 71881ae159f8f6cb5cb83c875465b95b4b687742 SHA-256: 04ccb710e53330c9b422397f546d669de98dce71939c9567c21ee1f80394ec3a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farming and directing users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users by redirecting them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=benefits+of+reading+surah+mulk+before+sleeping PDF link annotation
    • https://bebekibuxa.weebly.com/uploads/1/3/5/9/135993907/takob.pdfIn PDF document text
    • https://rixolojujosu.weebly.com/uploads/1/3/4/6/134622111/safikinezowo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_602afba5501e4.pdfIn PDF document text
    • https://senevabitup.weebly.com/uploads/1/3/4/2/134234896/toxibofukewoli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421217/normal_5fed55ee355a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/89096d66-7e2c-4f28-b3cf-0a493896c52b/how_to_know_the_stanza_of_a_poem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb67f31f-c743-4281-a6fa-baefbce940c7/86629095685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76badf0b-d688-490b-98ab-c0a53bc269b0/manual_auriculares_inalmbricos_sennheiser_rs_120_recargables.pdfIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_57d5aa2cdbc24658afce6c3f6f9deaac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/jojux.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/gramophone_cd_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/wafelasanaretuvugor.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/tarukaredadevokoge.pdfIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_3f72bcc8e7e74417a6b31fc4f19576f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/intracranial_arteriovenous_malformation_embolization.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/47702692097.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_c3ea63d161f6464b8569e7a289576f03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasudikek/company_loan_agreement_template_uk.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 5708 bytes
SHA-256: 3adfb1bdefb33b798de9222c639aa10c42f9220325979e4793d7bed544b3e550
font_01_sfnt_off0001016b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 11388 bytes
SHA-256: c2c55ac4f6b02eebe4c20a989d500c34dcd8b8655a93ea68558c017fdee36f94
font_02_sfnt_off000127d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D2 16028 bytes
SHA-256: 8345d1cc2b6b461b856d0454e2cf67edf5851291b6d0ebf21a7da0c9813a2b7f

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