Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cc3e41de29548e…

MALICIOUS

PDF

86.7 KB Created: 2021-07-03 21:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: effc7127e6c4ee251776e1642cc1a0df SHA-1: 7c83655aab1570a1070c50f499db72a29f79b351 SHA-256: 22cc3e41de29548ec5ed4afa2d2e27aadd48a9b05200eb0018fa39e8b7ede581
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating phishing. The document impersonates UPS and contains a link farm pointing to numerous compromised WordPress sites, likely intended to lure users into clicking malicious links and submitting credentials. No scripts were extracted, but the presence of external URIs and the phishing lure strongly suggest a credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://cructi.ru/uplcv?utm_term=spongebob+and+squidward+connected.
  • 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://cructi.ru/uplcv?utm_term=spongebob+and+squidward+connected PDF link annotation
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/91cb05c08a5d2eca16ba5ef2106c24a6/velofowukopezogefix.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/6799378635.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/rekonidijibewiteto.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160813dcce6a49---demulevogu.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec9584b159---kumikaxaxowo.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071ab5f9b8ca---38815251614.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/92bd7e1e2425c7a1355b35539567c9b3/karuzedofox.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/kenogozodopudov.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/86467254704.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/jozarenebumu.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/38a1bf3dfcd761fa039ba7c8bdcef65e/46876230143.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/58327547518.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/b40d308670366615e46e4514e6c69d45/84837122087.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609482fb1342a---75488372679.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/d1756017ce1368adcfd8e8053e14c74e/58277497637.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/77884539132.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e8e138a1c---sabofob.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19ce35d9f9---jojunuximifalin.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/pirikawixi.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe7bdd5c9f---12151534480.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/peseba.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_off0000eece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 17816 bytes
SHA-256: 3cab101cd9b997d45f3ccbceb77a943da71e45db64b03b03e1158ea44ee47a22
font_01_sfnt_off00011c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13441 11188 bytes
SHA-256: c64eb896a5bec3f0c6f55582b1253eaba07cd6caeb01b64a7d66942a1c7c224f

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