Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1dde37b15c8865…

MALICIOUS

PDF

70.8 KB Created: 2020-12-11 19:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3c1d868712d8cce67808f5b8f969cc40 SHA-1: 9099c9c184c27b1f071779200296bc17b9a991bd SHA-256: 3d1dde37b15c88650cfb6ba618bba65cbfeabf6aaf6fed4de7b45d26118e1a72
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The presence of a large number of external links, particularly to 'traffine.ru', suggests a phishing or SEO manipulation tactic. Although no scripts were directly extracted, the PDF structure and embedded links point towards an attempt to redirect users to malicious content.

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://traffine.ru/aws?utm_term=singh+is+bling+songs++mp4 PDF link annotation
    • https://talasawag.weebly.com/uploads/1/3/4/2/134265385/7a2c84dc21.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/4799565.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/5fc59156403f5353fdb5474b/t/5fcb9b8fa51c5a1401acf8c6/1607179155944/95810222445.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf56513570fb44d1f9abfa/1606374994780/lotegututarabexoregum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc552cfab79f442f246e6cc/t/5fcf6e275562961561529e77/1607429672356/draw_in_chess_by_repetition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e861d964-a216-44d8-88e0-e0f70bda8db5/piligokalor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10966a879396864091016/t/5fc1da64f3de5e49b5a8523a/1606539876475/pathfinder_2e_detect_evil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc147a892c50b1a1e7a1756/t/5fcfe716eba55d4eed5fc1bf/1607460634273/italian_radio_stations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7cccf22-a4ab-41f6-94bf-2efd7574df69/93757924600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99f66bc-6645-4931-9869-0a84dae74216/.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b7b7bf71053ccb0f47f0/t/5fd187117c12252903ec93d1/1607567124371/bus_simulator_ultimate_multiplayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c723bb-83de-4a0a-960e-17438cefdf1f/49428631009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a48bca-7943-4b05-ae80-e8ca890be8f0/nenonupuf.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_off0000bc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2D 5260 bytes
SHA-256: ab983a839d0045258ac8b53d21c7ca7cc50840b56d6e68bf18b9cd5d512a038c
font_01_sfnt_off0000cdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEF 10156 bytes
SHA-256: 8ed11762678d2a6e9005ca1175ffa39834e2b15a7e13f48896dae9722649ff5a
font_02_sfnt_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 18776 bytes
SHA-256: 9e8409b995ac2b0bb76eb3eb8dd1c90fa55d1c1c8a40bb5daa08ca4080948d13

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