Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6685f28e5c1448…

MALICIOUS

PDF

74.4 KB Created: 2021-03-01 21:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7f158417d0d1a73cb37e7dee46d693a9 SHA-1: 9a224bd6224a600629a0fb0a1b63f5ae0c28846a SHA-256: 1d6685f28e5c14487bc1136ec615400148659a22574bedfbc75cb0028927e9fb
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-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://jumiwimov.ru/123?utm_term=dell+optiplex+9020+i7+specs+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465257/normal_6032dc2577297.pdfIn PDF document text
    • http://megatorg.ru/what_is_the_best_robot_vacuum_for_carpet_and_hardwood_floorsysz24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_6019f370d8c33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc85e48e40b0.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/419250.pdfIn PDF document text
    • http://tb-films.ru/pipixijetijasuc3dp.pdfIn PDF document text
    • http://melukutirigap.22web.org/31710572474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475212/normal_600a9e3ba76c0.pdfIn PDF document text
    • http://reznitskygallery.com/spotify_online_erw0w4m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470222/normal_600ebfa68b83a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447663/normal_5feb0973ee8ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://peduzolojuloji.epizy.com/20261837407.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/godubububakarapanop.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/black_and_decker_jigsaw_blade_install.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/systems_engineering_principles_and_practice_3rd_edition.pdfIn PDF document text
    • http://fodabobaxuti.epizy.com/sofabuwoxufovijasusevu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/free_certificate_design_templates_psd.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 5296 bytes
SHA-256: e9edaabbcd8e2087bdae61a5f7142010a6e4c70ca6dcfd66eff0a7fd82694661
font_01_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 11320 bytes
SHA-256: 612eb7b87349b921f6182cca966fa8d41392d3fd8a7b17c4eb093881e4ed68c9

Open this report in the interactive analyzer, or submit your own file for analysis.