Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8e0d7aa94f1014…

MALICIOUS

PDF

84.2 KB Created: 2021-09-08 05:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80c879109f8ec981e7f5bf75227cf98b SHA-1: b996b0ce35c7fc6dc77e572bf7d3679fd616b934 SHA-256: 0b8e0d7aa94f1014b848ab4413cd2d1bee19ad5b332e60fec619fa2301a014b4
196 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. The presence of a 'password-protected archive handoff' heuristic suggests the document's primary purpose is to trick the user into obtaining a password for a separate malicious archive. The numerous embedded URLs pointing to disposable or potentially compromised hosting, including WordPress upload directories, reinforce this attack pattern. No scripts were extracted, but the overall structure and heuristics indicate a phishing attempt designed to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=reduire+la+taille+d4un+pdf+en+ligne PDF link annotation
    • https://kalitelivideoizle.com/resimler/files/bisitulobowawolivixuzuseg.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/vawegamebusuzipefumiv.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/suvubo.pdfIn PDF document text
    • http://okun.su/upload/file/8059799778.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/vokaguruxajurewaje.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1c231a66c4dffa99c357fc31264bdc80/83487424349.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/jukf2uc016lbsairovai61a8t3/zobum.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/weledaxelifimujaxagos.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/efimitazeg.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cfc0f3d8f---47257170063.pdfIn PDF document text
    • https://cristalensi.com/public/File/43498112148.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e7f47f525---ridelinufevadi.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf9afb7db9---36269472182.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/47425454690.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/29444380497.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/4a43d47fba9e56200bed6be399935b31/lalefiwasopuwemifawerij.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/ziwuzebosapajoson.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/kabenepowasanovixevije.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/4b6e3dd223a8ccbd2564372552c238dd/vuzupibojeje.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/h19jn6ipu4c37o74s3kja00ob3/97951554395.pdfIn PDF document text
    • http://www.siposferenc.hu/html/96986404328.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dd170efc7---76856403115.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/37358007631.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/rujomofidokobubupizuled.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/wozomilabizaf.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/s04e968n3535d8252bs5u41tq6/53910798302.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_off0000e132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE132 18848 bytes
SHA-256: 772a7532a5730e29c0ee653e61e001a2fe748e2a1205aed44f07f7ab699ce143
font_01_sfnt_off000110ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EA 10608 bytes
SHA-256: b39eec8442bc324dc186b633a5affdf03802317f4859204d08405449675d283a
font_02_sfnt_off00012911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12911 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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