Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8d7542e2b479eb…

MALICIOUS

PDF

84.1 KB Created: 2021-08-14 19:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 17b9446e9f0bdc3dafa2c9ed3c58e013 SHA-1: b1b10e91019ef12842ebd437ab052599a4f7ad92 SHA-256: 9e8d7542e2b479eb402aa8e372dba66d484a719fafc36b2ada3106245da8b77f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests this tactic. The presence of multiple external URIs and the ML classifier's high confidence further support a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://coretry.ru/uplcv?utm_term=stickman+warrior+mod+apk+android+1 PDF link annotation
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c69a58ce1---99912034462.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d52eb6fef84817fcf1f11d554a2bb785/rofevomowokotefatasikivil.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d078ae2158---26039611901.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecec3c2d78e---fuzudanogoku.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/dbdf17633f91b73587e684e489886e1f/12489151830.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/fufosoxudakinoloj.pdfIn PDF document text
    • http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/59728689183.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/77698254105.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/72330252884.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/nugasegifuronexorawenuw.pdfIn PDF document text
    • https://mollis.rs//files/pitap.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a16d0ac9a109dca272cf066411b3e25e/1167322519.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/15387432847.pdfIn PDF document text
    • https://2acontractor.it/images/file/xokifas.pdfIn PDF document text
    • https://redac.ch/upload/5235537614.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/zolukavinamevenexudimada.pdfIn PDF document text
    • https://kawanmto.com/contents/files/77997089191.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/7kbn7rn33olii88ntk7dnu9jl5/82665226617.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/cd5ce69454d4403ef4af99c92e2a5204/werupibetexixu.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/wevadigofapefes.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/8012020bfb368216b97b28acea2eaf5e/ruretaxexejezopiritu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 16648 bytes
SHA-256: 6e7dcba701e4d7b97f2ba84090fd0d0ac897b2729ac206ce5014f7d4c72227eb
font_01_sfnt_off000111df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DF 10636 bytes
SHA-256: 46d095cbf6633202a7081b315b78b072947964d458f678430f0b12daf0667e52
font_02_sfnt_off00012a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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