Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ded00dbb963091b…

MALICIOUS

PDF

94.3 KB Created: 2020-11-18 04:32:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4f3e21c2e93b50ae1ebdf1129760646a SHA-1: ddba1b4597a9d69efe821064f4497060de153dab SHA-256: 3ded00dbb963091bdf5fbb8e38ca09e725542c8107649c28fd4abd6f1fb10905
186 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 0.9997

Heuristics 6

  • 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.
  • 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://traffine.ru/123?utm_term=dyson+small+ball+multi+floor+manual PDF link annotation
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/viroboke_wokesitebip_pilajuwuwogeg.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/pasepavixufevowatose.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/9591872.pdfIn PDF document text
    • https://tapinizeguzuj.weebly.com/uploads/1/3/4/4/134456840/cd6d4498bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450151/normal_5fb4709cc6ffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_5fad9d6739e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457014/normal_5fb27c43d22a6.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/wixomewev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_5fa45f8508157.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/annual_report_garuda_indonesia_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675e482a-22ac-449f-9025-69d02c9f8639/dogivinaxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddabc934-1921-4bf9-8862-b88c1767a28e/80064508732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb2dbe4-852e-4d31-848c-52436af092f9/bubanozegasededafawalafin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfebb7ae-d894-4c9e-8479-3e935b255f7d/lisapuxofovaroza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d116d0-e9a4-4b3c-9066-0a09acdb82ee/79364031745.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000142b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x142B7 23536 bytes
SHA-256: b4ca88f82b4f3d5b5561f9e32da9e4eed0a61cd872ee99813b33d793eff1b8a9
font_00_sfnt_off00010c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C72 5156 bytes
SHA-256: edd7645b7e89405a9602e718cb13b60239e4e3a21fae8a767292b42783c19d5b
font_01_sfnt_off00011ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DED 11208 bytes
SHA-256: 8ce760e8c671e0d5f4d44cc418c8b031a7359a98f113473f20682dc579ae6a83

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