Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abd34ff05145a3f…

MALICIOUS

PDF

76.7 KB Created: 2021-04-25 20:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1d117bde772daad2778b16066f5479fb SHA-1: 58c41037d08973dfe12d5e13062891a2a3727210 SHA-256: 3abd34ff05145a3f86b8bab7b2efaada82198a9816e62ebd59631f41a843d12e
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://crophysi.ru/strik?utm_term=no+fear+bridge+cheat+sheet+acol PDF link annotation
    • https://sosufafa.weebly.com/uploads/1/3/4/8/134862430/5665224.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/jdijXaA/notafabemurodeves.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/jfajigc/adverb_of_time_worksheet_grade_3.pdfIn PDF document text
    • http://cloudmarket.website/xikolafixelozrvml6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427105/normal_5ff7cc0bb6472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470405/normal_6023036c7a4a3.pdfIn PDF document text
    • https://nigafabap.weebly.com/uploads/1/3/4/3/134377596/7505177.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/ajahcge/70475636181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_60381c6c8a9bb.pdfIn PDF document text
    • http://voirlo.xyz/nuzenuglxfr0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_605d8ca058ae6.pdfIn PDF document text
    • http://mitsumoro.ru/aircare_ma1201_not_workingl6q8c.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/bgehfUr/loudoun_county_animal_shelter_donations.pdfIn PDF document text
    • http://ashotik.space/larivipegitosudaku6cb1m.pdfIn PDF document text
    • http://medyayazilimtr.com/silent_hunter_5_mods_alles_freischaltenzr7hr.pdfIn PDF document text
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/pimok.pdfIn PDF document text
    • http://apkweb.net/pandemic_alert_levels_ukukvw1.pdfIn PDF document text
    • https://cdn.sqhk.co/vogigoda/CijjfJy/sepsis_guidelines_2017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_6008b654c089f.pdfIn PDF document text
    • https://cdn.sqhk.co/megeveze/gdYjgTm/91436787846.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA88 5392 bytes
SHA-256: 1d40ab7f75591a36311e1e26c0b566f3c654b43fe163c99ed0928305fa4de4a4
font_01_sfnt_off0000fcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDC 11292 bytes
SHA-256: 8b7886481c7eb80b83ec09c9e742f7816aef7b20f1fb9d84f81c51314411cfdb

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