Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3226895fbd47e1…

MALICIOUS

PDF

72.7 KB Created: 2020-12-23 03:14:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7db1577d4d64ce04011c9c86fadea6ab SHA-1: 1f14c8beca8a43f0879d4be92fba75e16c3914b6 SHA-256: 4e3226895fbd47e1edf4189c4f23426d14f6869f927efa847cc8d23d58caad09
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 0.9995

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://trafffi.ru/strik?utm_term=espn+plus+ufc+streaming+issues PDF link annotation
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vunidixeviro_xitosujitupile_kadape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445343/normal_5fa3875ef13f8.pdfIn PDF document text
    • https://mipapipav.weebly.com/uploads/1/3/4/0/134012398/bilogofibobipe.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/jasoxevedizave_wedezalolebo.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/gabifalejegulakib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5fadb561c92e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423462/normal_5fb51e400d024.pdfIn PDF document text
    • https://jukawowirorab.weebly.com/uploads/1/3/4/6/134662443/05b3d92375e.pdfIn PDF document text
    • https://naxomusiji.weebly.com/uploads/1/3/1/6/131606859/c5e294d17c4fa.pdfIn PDF document text
    • https://sibiwowimi.weebly.com/uploads/1/3/4/8/134868192/kezogowut_xowosodu.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/5fdc80e9ff99f865bfec01c9/t/5fdd220d5907031166ffab47/1608327693211/siludamuwexopaga.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0406b474932ca2689901/1606222855210/wash_by_william_faulkner_characters.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF13 5292 bytes
SHA-256: 984728008194d8253ee5c35bf264732b35a1cd185aafa132ea324f9a079041fd
font_01_sfnt_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 1824 bytes
SHA-256: 9cf6a693c6de8ff549079f4d9ba5dd516ec7d6ee6d00f65902efe09d81bcf205
font_02_sfnt_off0000d9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 10336 bytes
SHA-256: f10489978b42d536abb94b2bb20d2627f69a62726dd4621d1b77b5252608077a
font_03_sfnt_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 17272 bytes
SHA-256: 544d8cbaac27e94e85800e554ef7132039bfe3e3ab9e27d72fdb8ff72bccd7cd

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