Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0b6eeb1f6a0a6e…

MALICIOUS

PDF

135.3 KB Created: 2020-11-20 12:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 842355df01e2ef79fc3b20ee2c90432c SHA-1: 2a90802e54c924f0f1189eb967b2f0601b6de68d SHA-256: 8e0b6eeb1f6a0a6e8e7d9a730e1396017edbd718ec01d0f6a220f82dd4d6fc94
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafffi.ru/strik?utm_term=witcher+3+romance+ciri PDF link annotation
    • https://diwapexag.weebly.com/uploads/1/3/4/4/134484560/5e566c.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/69f65a43db51b.pdfIn PDF document text
    • https://zavomori.weebly.com/uploads/1/3/4/3/134335150/2883956.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/43a349bf4de6ea5.pdfIn PDF document text
    • https://jowetetezuvam.weebly.com/uploads/1/3/4/7/134717416/golavaguxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/5096817133.pdfIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/lagezi.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/algebra_mathematics_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/lagu_di_waktu_yang_salah_wapka.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/77509921756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df38a6e8-54b4-4a80-9cda-2f8e60853c7d/piano_keyboard_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a55f5b0-7aea-432a-a8c7-1ee3351c9af3/22665010508.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/calcium_channel_blockers_mechanism_of_action.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81761e9-a3d1-4369-a6a0-1cce18979359/psychiatrist_salary_austin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c73c36d-8a5f-402c-8e66-bdbed343837f/wugopedaritivem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAC3 4796 bytes
SHA-256: af462498395dfcff023a386aa66d1c4b9b472fed1744af9d670f15f4b2a318fa
font_01_sfnt_off0001dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAE3 11504 bytes
SHA-256: 17f6218e81fa8740c6569c196963e0aeb6921721b36979a64abaa1d95ca73e42
font_02_sfnt_off000201b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201B7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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