Malicious PDF — malware analysis report

Static analysis result for SHA-256 9867d6bdbb150949…

MALICIOUS

PDF

89.1 KB Created: 2021-08-01 00:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 4cc3495b46890743672c9246992ec4c8 SHA-1: 8fdc6bef75dfa38d514f5aea1cb094df1f0cd09c SHA-256: 9867d6bdbb1509493ad044add287827f2f28064cce5a27390d92fb6994f6630a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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, many hosted on compromised CMS upload directories 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 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=mouse+sensitivity+pubg+mobile+pc PDF link annotation
    • https://btsis.com/upload/ckfinder/files/47552507564.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/8bc273e84e63416df3d5e550ed61f3c0/binanonebetofo.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/28069196680.pdfIn PDF document text
    • http://446888.top/userfiles/file/99689934697.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/zinitapigigob.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/jaxezilavogepotubeb.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/67429202150.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b68d7c6b2c9d2c09f81d50d2df0a0083/demirefowijow.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/kamobawigimaxodir.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ed4fe06f8339c50dd54eaf71bcfd1df2/85729416885.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/wijaminiretade.pdfIn PDF document text
    • http://sharise.net/Uploadfiles/files/58590256757.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/11v8pff96tprr889ehk86bmml6/titafawisomen.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609df3bd50690---92638302710.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/91810143023.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c78601ad17---15816270241.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/gizojakenanijasibajipek.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/7948463090.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/42890914338.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eb9fd983a---zerej.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/71206339453.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/negaganijizaluled.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16079aad08ffa0---rujumowudufizibafoxemu.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/womurojafixiwipatapekumug.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 10868 bytes
SHA-256: 582f6b6371213ef8caef417d35e1d295ac0824505d3bcd8ccac3fda4ed2996ab
font_01_sfnt_off00010b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7E 19668 bytes
SHA-256: 69fb8b4a47239bfe68ad6c699f0fa517693317543fc82896439d93139ae2f590
font_02_sfnt_off00013e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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