Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d6719204483c66…

MALICIOUS

PDF

68.8 KB Created: 2021-03-29 17:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f4c72139edf01fff3bb84925283068ac SHA-1: 05db3b6ae35e2b63ac6e25587b266504bb65273d SHA-256: 67d6719204483c66480ffa61551c11daee98db7b69b90574cb3253396c7ae088
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, with one pointing to 'https://lozipotod.ru/wix?keyword=pinoy+tv+replay+show', suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://lozipotod.ru/wix?keyword=pinoy+tv+replay+show PDF link annotation
    • https://lowixuwegula.weebly.com/uploads/1/3/0/7/130775587/0a9abf4471c0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418590/normal_6004cfc465cfc.pdfIn PDF document text
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/6969997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5ffe7ac20202a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459787/normal_5fd968a422045.pdfIn PDF document text
    • https://medofigovur.weebly.com/uploads/1/3/5/3/135316586/redonidoluwukumonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_5fd8f77a18723.pdfIn PDF document text
    • https://natutiwuv.weebly.com/uploads/1/3/6/0/136019317/08423.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_e76f2e00f9e6441fa39b7bf992c710ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mufukep/harlequin_romance_writing_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba01def-0282-4fc5-b407-a604ee679c6c/what_is_a_battery_tender_charger.pdfIn PDF document text
    • https://13a2bf7a-7930-4518-a7e6-737bf3c0aa4f.filesusr.com/ugd/f5c1a0_e99d780ea41c4b26b098af17ef1a2336.pdf?index=trueIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_74a1363575cc422a9e0c98172bef6c57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/nejunenilawiraxupugarani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48d32c6-f9f8-44e6-b124-53c520eb94fb/zojat.pdfIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_7b859309c2c14a6cb4a7e66d7f9dc0fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/505e28ea-0990-4ebc-8d7e-2f0b4c4a418a/what_is_a_good_hyperbole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc7ab4c3-93fc-423d-8a89-09090f792ecc/92749916864.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/kiviliwilapenokurofisoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c264865-e0af-4c8a-a95c-da5c268147fb/rukibavutepugobakun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9adfe00f-69f6-4628-ad54-61818da6089e/firibazilafezixemiluv.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/video_buddy_app_for_ios.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_90323284a58a414092c048d6b1eae813.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_off0000d2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C3 5160 bytes
SHA-256: 0a85383b9a424ffe4bcaa18b4590b17afa95eabc68a197ac571a29d51bda6aca
font_01_sfnt_off0000e461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE461 9684 bytes
SHA-256: e40cb4cdc6d21685efcdeb7e1fcbf2d8e547922d753bc43620dd7c154d0bdd5d

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