Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42a30fd673945c8…

MALICIOUS

PDF

77.8 KB Created: 2021-03-07 09:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1194aae6e82e063b55502a132b14e12 SHA-1: 921eddbaf6e10452ee8c21cfe66d3c0a16f0dd3b SHA-256: f42a30fd673945c857d1767c2d007c1dfb1b3a87bd0b110cd54e3a460dfcb012
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 0.9981

Heuristics 5

  • 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 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://xezojetit.ru/wix?keyword=tsum+tsum+robotmon+settings PDF link annotation
    • https://medijomozu.weebly.com/uploads/1/3/0/7/130775841/fc9c7a.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/4gghhia/86781480273.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/requirements_to_get_a_job_at_ross.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/77997240421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5fe8f49c3b770.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417128/normal_5ff185b66c848.pdfIn PDF document text
    • https://cdn.sqhk.co/pijovowifil/fjggjgf/villa_huntington_mobile_home_park.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_60267a652e753.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/nMrgehc/37568205231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_6015b869e366a.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/joxomutazebamipin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496824/normal_5ffc1b8c39dc2.pdfIn PDF document text
    • https://jitaginedisa.weebly.com/uploads/1/3/4/3/134324559/3958663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_5fd678c93c23f.pdfIn PDF document text
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/nujofojazaxebasukuzo.pdfIn PDF document text
    • https://mamonaxerif.weebly.com/uploads/1/3/5/3/135347384/pewobalosunasoges.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/hdNCg8T/shreya_ghoshal_all_telugu_mp3_songs_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452376/normal_5fd2837108c32.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/gtjdSjd/download_game_boy_apkpure.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/kefodek/demipibulemozimebaku.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/wow_classic_mount_vendor_orgrimmar.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/moniwidebenisiz.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/mofowuzosijuza.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE66 4736 bytes
SHA-256: bdf05fc0a90d398099c42c19b86bea899d5d64f3b047a2cd8377b902547fe18c
font_01_sfnt_off0000ee5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5C 1892 bytes
SHA-256: 6c40c24049063d20f38f379a1ca3b8fd5527db7973066f59bb6b8bef044e1f73
font_02_sfnt_off0000f77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77D 10336 bytes
SHA-256: d1f20ee4a9917e3d8927b9543e1f0dbe5e51a7c0aa1c7377bcb18c100d11067a
font_03_sfnt_off00011aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEC 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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