Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ed7cb99266ab32…

MALICIOUS

PDF

105.0 KB Created: 2021-08-05 00:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7cd964b4c82cc968314fa500d4f1667 SHA-1: e0e55d45e233125e7894202de0e607375a76323a SHA-256: 55ed7cb99266ab32d92541890b6785d5d10158d2c9582874d09dcfb59a98b81d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the nature of the links indicate a likely attempt to lure users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=babata+namak+with+meaning+2018 PDF link annotation
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7de90ee43---sesoxebel.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/54538528141.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/3265354852.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/53590764289.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/lumonavepebegipomugomelak.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/576d08c6b03a8ddb8934d25c0d8dd0f4/jixejobokes.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/35335354233.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/7fe133c1597c8dce44fb66ff6f4399b5/36534514703.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/22045449215.pdfIn PDF document text
    • http://labsshop.com/d/files/30744474027.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/irfrln152m3afc5hb05k9in7g9/seligopoz.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/34482465080.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc94ad8199---95562746803.pdfIn PDF document text
    • http://geotersrl.it/file/paretuxutekexin.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b99af16e8b0---56951079845.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/jexorapegananetida.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c671afb4968---kelosapaje.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781597e7c14---55383151788.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c79e7b439d---welaxawixupe.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/rgh4tdff0ho5moa9fk3lvtdf7n/68065714633.pdfIn PDF document text
    • http://boursemoi.com/userfiles/file/kegiregasovifebemivusa.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085da7d025ac---magegurovepoguvu.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/33941848993.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/18829775385.pdfIn PDF document text
    • https://wipaphun.com/UserFiles/File/pedom.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_off0001183f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13050 17148 bytes
SHA-256: 39eca3a15bcd980acfb591226652c0f2f3fe693578d25fefbb417f59dc3e7c0e
font_02_sfnt_off0001497c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497C 10996 bytes
SHA-256: 016f260060754ae52e30c209b14192f8a7856603e1fdbbc3eb26e1db36266cfd
font_03_sfnt_off000162fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162FE 19256 bytes
SHA-256: 0ff2dc674618f6273d4c049198705b79de0ef1a94912a74818991f363b5f1b72

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