Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bcf8662343adb2…

MALICIOUS

PDF

78.7 KB Created: 2021-09-07 19:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3f942285827735d86be681b4499c34bf SHA-1: a17ef94e5558cb6c3079eda01df824463917e10b SHA-256: 24bcf8662343adb2f552df629b10aea21415b61c0ec7dcfcbe20ffcfad880d1d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm hosted on multiple compromised websites, likely intended to trick users into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests this tactic. While no scripts were directly extracted, the presence of external URIs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://krisoc.ru/uplcv?utm_term=convertisseur+pdf+en+jpeg PDF link annotation
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837fdef393d---38170161409.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df7570f45c---jotuzusubaviwuwiter.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133dd6ba6f2d---xodijo.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/67c35954a893be5ece338097b64070e0/sesozijiw.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/eed8971f0d33576c86691e0f9496f5f9/zemeguni.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/35091840365.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8e78e4f22---datos.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/b32e253f1a1e2551293f551e339382ee/13833410299.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021090407101858.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/wabitikupokifidigesale.pdfIn PDF document text
    • https://melz-feu.ru/upload/nonekozofojabasijizigileb.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/82646779171.pdfIn PDF document text
    • http://cosyromania.com/media/file/xolemapepopavem.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/wesixesidebupev.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/31491456da203fccb3c7dbfdfeddfe20/xodetodefoviziwezuvut.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160952f80420ae---54821585322.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hfth0792upuej1m1th0qtpqrs4/tobirugifidi.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/56546092558.pdfIn PDF document text
    • https://wrd13.com/force/file/41230440750.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/38645200747.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094f60305497---67495889935.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/biderizujojatojatov.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/0493ff478bc194b695626ca70abaf4bc/wasudomimamajedatako.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_off0000cf79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF79 17992 bytes
SHA-256: 3139ba624b9dcf136779fc1198f1702a51cca246cbb5bc3b5a8a908c300758a2
font_01_sfnt_off0000fc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11446 10792 bytes
SHA-256: 6291169a98be7e11cee2515f5774c3c2d3497395a2875733c7fb7f0c4f4f0c95

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