Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2740ff76c3dc5a…

MALICIOUS

PDF

70.2 KB Created: 2020-12-02 14:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f241b5368673a94c510ae8c542e53bbc SHA-1: 6788c18c15441f082f5982167e7ed8b080c6bafb SHA-256: cc2740ff76c3dc5a98157be27bc31ee4cb76a305f79da9d651cd256bfd9d1df8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://trafftec.ru/123?utm_term=bad+spray+tans+pictures', is embedded directly and points to a suspicious domain. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized nature. The ML classifier output of 0.999766 further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafftec.ru/123?utm_term=bad+spray+tans+pictures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403539/normal_5f9279186a434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_5fb8c89b7fbae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f8a9fcaa8680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f95348b8ce59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_5fbdee4a930d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474727/normal_5fbe19b49f643.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/4762810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8740704b91c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f05df9866f3fd2d48fd4/t/5fc5807218e72e5fdb937c50/1606778994477/padadolevizapulapasunub.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d0065e8e827d428d60b5/t/5fc6ec90c953717e09ca5c43/1606872209347/idle_tuber_empire_lenov._ru.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffa571c8c7413142c9acf/t/5fc152074e98326c024169bf/1606504968140/ford_commercial_song_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13eea24b06a7eb3017ad5/t/5fc5d60e173fb5383b6dc2a6/1606800911405/play_doh_in_asl.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de9c5bcb0228a2825217/t/5fc1019aeaf37e3b64bf76a8/1606484378789/to_kill_a_mockingbird_chapter_29_figurative_language.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d432dd96f5918e4fcda/1606372683853/98217406811.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6bd5687f52b6b817d01/t/5fc253021972c46e3cea12d5/1606570754295/cnn_10_september_5_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5889a97599144eee8af1/1606375563776/14705104684.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144dc68612547ed60a5eb/t/5fc325213c6ccf69f3c58e01/1606624546313/75125015428.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58E 5184 bytes
SHA-256: 1832e0a51172e49957a3ef65082e82c167a2aa41618298e4734c6ce5227bf9fc
font_01_sfnt_off0000e74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 10672 bytes
SHA-256: d469f6f97f4898fef406c0a8e766fc991f4539c450a936339710027725a93b66

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