Malicious PDF — malware analysis report

Static analysis result for SHA-256 83866a0185d6279c…

MALICIOUS

PDF

65.0 KB Created: 2021-03-23 00:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ecc60f4f29c41769d3ac5b332e8d3f77 SHA-1: c1b51ceebfafefbe89cd0b26ef7e9f65891e06cd SHA-256: 83866a0185d6279c558720098f90e15869c1a351eaa29ff9eedb43391f8430d9
134 Risk Score

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/123?utm_term=chaha+to+bahut+whatsapp+status+video PDF link annotation
    • https://cdn.sqhk.co/ribobujir/e5haifr/full_steam_dumpling.pdfIn PDF document text
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/pekagodalutaxulu.pdfIn PDF document text
    • http://nalatakojuzali.iblogger.org/supplier_approval_form_example.pdfIn PDF document text
    • https://cdn.sqhk.co/demanajinu/hc3TYRj/facebook_lite_login_download.pdfIn PDF document text
    • https://fomutifimo.weebly.com/uploads/1/3/4/5/134594787/vodila.pdfIn PDF document text
    • https://gaviwejijeto.weebly.com/uploads/1/3/3/9/133997776/vujokesebowegorudun.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/xKheMhe/dragon_wallpaper_hd_for_laptop.pdfIn PDF document text
    • http://rulazix.iblogger.org/pizab.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/LhihaJh/50491125970.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/PibLjcP/clothes_worksheets_clipart.pdfIn PDF document text
    • https://cdn.sqhk.co/logenuzupug/jim13Oc/nazizuwalibajobomititoxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_43ba31cdb662429dbd4c440274a39660.pdf?index=trueIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_820a995812be4ceb974e8f1443c24859.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_d13e2e19b2ce4a9193b35393c5c76996.pdf?index=trueIn PDF document text
    • http://zuvujivir.rf.gd/nuovo_account_gmail_su_android.pdfIn PDF document text
    • http://fejusadifidexi.epizy.com/frost_sullivan_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/guwagupejisanegosi.pdfIn PDF document text
    • https://620678a0-8f5b-407b-881a-8a96a128c1c4.filesusr.com/ugd/25b7a6_6dd08b9d3df94b0f970d44b4a3cf425c.pdf?index=trueIn PDF document text
    • http://ripilunuw.rf.gd/99071992496.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/the_pedestrian_by_ray_bradbury_analysis.pdfIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_7fb1e700f1fc473188a5f34985b20735.pdf?index=trueIn 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_off0000c3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C0 5116 bytes
SHA-256: f4996e3065a8f4ac03554deef68ab10091a603f697a71bc5a6b06bc7c19f7b0c
font_01_sfnt_off0000d533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD533 9832 bytes
SHA-256: e81c1521ad504c68bccff75375172d6d0037a0d116537aca20e1c81fdbaabd04

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