Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4232b92f1a502d…

MALICIOUS

PDF

72.1 KB Created: 2021-02-22 01:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc1620fbf399a3503ffd9792206ce1a2 SHA-1: 5c3f929af14e259a7b78a9e4934d08e924537224 SHA-256: 4e4232b92f1a502d009774448a64f86ab03e6d20b9adebf0e8707a0b044a387b
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://bologen.ru/wix?keyword=vertical+circular+motion+worksheet PDF link annotation
    • https://cdn.sqhk.co/mirofifuba/db5dIjj/sunujomimi.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/ZbIgfih/neleriramojaxekakos.pdfIn PDF document text
    • https://duvefotod.weebly.com/uploads/1/3/1/3/131380754/ae18d029dd4bc.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/lrihhjk/color_block_maxi_dress_wholesale.pdfIn PDF document text
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/sodopapavatesavituk.pdfIn PDF document text
    • https://zexirajeroluwub.weebly.com/uploads/1/3/4/8/134848753/muzivek-simezuvukapefaz-lirakinudepe.pdfIn PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/5546488.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fc576668cd5a.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/S2ijge5/32079135722.pdfIn PDF document text
    • http://ogranicbio.space/neverwinter_searching_the_present_document_locationsticmj.pdfIn PDF document text
    • http://minozodatatinad.22web.org/atem_software_control_download_windows_free.pdfIn PDF document text
    • http://realnoe-obshenie.online/85129819924hedut.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/fhfyOia/boomerang_glitch_castle_crashers.pdfIn PDF document text
    • http://goproonly.com/mthode_vittoz_exerciceshd33e.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/hh2gd4v/nail_salons_open_by_me.pdfIn PDF document text
    • http://cosmeteca.com/bomber_crew_game_ranksfetuy.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/gdgOiiQ/rudapusuwetonenisoviv.pdfIn PDF document text
    • https://darefosal.weebly.com/uploads/1/3/4/6/134601331/bukiru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jixetumoxefa.epizy.com/que_es_un_lien_release_en_espaol.pdfIn PDF document text
    • http://mixexomamag.rf.gd/wimamusawinefejesifebav.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC94 5160 bytes
SHA-256: 718363e0eb9301a3b44f502f2d4eafb112133353306f5f00ca8f760d41482689
font_01_sfnt_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 10552 bytes
SHA-256: 2533c753b0cd8856ac2f698c9687cbc4caeec8d23a81a06a5ca0f71b6b006fa2

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