Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfaccd3320b9c11…

MALICIOUS

PDF

80.8 KB Created: 2021-08-03 18:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 74cb140f306a0e6f612b735fd743e1a1 SHA-1: ae2f24550ebb11b5e4cda3f99d0454d3d3641e40 SHA-256: 9cfaccd3320b9c11016e578b7733087911489758bf918efbe6493e5357cab7e3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan distribution vehicle. It functions as a link farm, containing numerous embedded URLs that point to compromised websites, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple compromised CMS upload links and disposable hosting further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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://medvor.ru/uplcv?utm_term=free+piano+sheet+music+amelie+comptine+d%27un+autre+ete PDF link annotation
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4b7d0452---97847330388.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/be5adbd530a2d92b3378c535566ecc9c/mesojulomilokokidesi.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/kopinifuzewawefinifogol.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160834a7ee4dba---dogumenekuwegekedawamak.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/88542147561.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606feea43f461---96956172373.pdfIn PDF document text
    • http://championsview.net/userimages/vopaxumozenukofosovexuja.pdfIn PDF document text
    • http://yuha.be/_files/file/89760891966.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/5ktf8tj5c92v7p0rvu04dl0ri1/xejunik.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ed4585d0ad71ac3e0dd409cce33f113b/babipetadamota.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/nisekopizowekisuguxus.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/41449435436.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/fekifetitadenerunolajegu.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/gs3glls9eo4q5cm6ttqhirn9ci/79560301041.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/68073014369.pdfIn PDF document text
    • http://yepuco.com/uploads/files/27186210286.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/p3jpca21a2qja6bf5qmjsqper0/gawakivijesexowinedomiwi.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/marogufuw.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5fd3a31da---kujuwazon.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/79dfed704ffa1e6a649279a135b355a0/rofomewelutokeru.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/dexopofokafol.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd287449eb---10292298007.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/0d329a1dde8a9d6b908cec6b6db35d3a/71139255453.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4893d1196---dunilarosulafexivididu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91F 17000 bytes
SHA-256: cf268f6ea45c70a38e5db517a63bdb251af0280427ec0ebcadf63dda4d0bab31
font_01_sfnt_off0000f505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1C 10888 bytes
SHA-256: 360a57fd5abf818e5377a082143ad68ef425b2134602eec9acdca83f2ad28681
font_03_sfnt_off0001260f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260F 2804 bytes
SHA-256: ab0cee7207c19ff2e14cbb8bfc59d5414cbf5aa0162544a265e93276d2fd3582

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