Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd86585d2c0a7f1…

MALICIOUS

PDF

77.5 KB Created: 2020-11-24 06:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e4010ba3e60fd18d1c212f41bd63fd5d SHA-1: da2f0f92bcfbb2d9b71aabb2b9e3845f3e64ca0d SHA-256: 4fd86585d2c0a7f1427165cc29c41bf6ab5b8659b2bda265700c63d7acc356bd
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 0.9998

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://traffking.ru/strik?utm_term=into+the+odd+review PDF link annotation
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/rozav_tapojox_wefuwolav.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/tisaxuwabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f926a982e25e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5f8ff482b68b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f8959759032e.pdfIn PDF document text
    • https://ludasajuwo.weebly.com/uploads/1/3/4/0/134096591/a128f04e2922.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/dulojof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f8cfd1083e98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5fa2eaa43ccff.pdfIn PDF document text
    • https://xixafaxuxux.weebly.com/uploads/1/3/4/3/134340403/jubezap-tesimefenajabis.pdfIn PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/3ff15fbda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5fb4e1fa1be57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5fa119d1c6c01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f906b2fd4fe9.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/ganubifirigevi/mega_man_5_passwords.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/women_working_in_factories_during_ww2.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C6 4368 bytes
SHA-256: 9d5806bc7f0b5a74d4d0e83b177e2493969f1c0d22aa00e165515d66df7c32e9
font_01_sfnt_off0000f595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF595 10532 bytes
SHA-256: 3facca13afd1558c4d7c15527d9ec0198ba35fb57dfbbfeeaa2043f950f70c29
font_02_sfnt_off00011976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11976 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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