Malicious PDF — malware analysis report

Static analysis result for SHA-256 0418cf2ead73dfcb…

MALICIOUS

PDF

85.7 KB Created: 2021-03-08 09:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 79e34bf12268a44e0cfbf3399856dfd5 SHA-1: 2fa71fcdd3af40a3e0b775d4216804587f78ac65 SHA-256: 0418cf2ead73dfcbe3bde61a51d655c144f43166744fce8130db8966c934fd75
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://druttle.ru/wix?keyword=sierra+comfort+massage+table+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492588/normal_603e24f170ca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_5fd663f78eb15.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/hiRhdji/basketball_game_tonight_channel_directv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_601ec0b62bc84.pdfIn PDF document text
    • http://tadezutalowebe.22web.org/differentiated_symmetry_worksheets_year_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5fd1820498410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459787/normal_6037dfe137538.pdfIn PDF document text
    • https://cdn.sqhk.co/bokupajokim/hishcgf/weaphonestm_gun_sim_free_vol_1.pdfIn PDF document text
    • http://pimipaxu.22web.org/64240792420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5ff02be98b6ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464735/normal_600d45b6d451d.pdfIn PDF document text
    • http://tokujanorix.iblogger.org/9730166261.pdfIn PDF document text
    • http://kufozafonole.22web.org/3815986146.pdfIn PDF document text
    • http://rebejuguvodog.22web.org/lapijubujepoxofevadetaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471114/normal_5fde7745d3807.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nupabekasowijem.epizy.com/bose_sounddock_portable_digital_music_system_n123_price.pdfIn PDF document text
    • http://divogidiguxofib.epizy.com/final_fantasy_xv_royal_edition_ps4_cheats.pdfIn PDF document text
    • http://bumelujezi.epizy.com/forms_by_endochondral_ossification.pdfIn PDF document text
    • http://riwekijeworore.rf.gd/expulsados_por_francisco_jimenez.pdfIn PDF document text
    • http://lujajali.epizy.com/private_parkour_lessons_near_me.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_off00011089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11089 5596 bytes
SHA-256: 20247b2229cf3cbda0d6c6afc62c89ea73dcb0d7be5aebbeecb42c3fc3f640a3
font_01_sfnt_off00012394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12394 11204 bytes
SHA-256: 68cec6a5cce882520967798e7c49d67ec9aceb0ce7e6f90ae7828dfebcc770c7

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