Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa2a8a6e49fa31d…

MALICIOUS

PDF

71.5 KB Created: 2021-09-25 06:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cebe30c030b8755562e6a5489e10bb7b SHA-1: 1900d81337960e98f7245edb561b38c569c21f08 SHA-256: 6aa2a8a6e49fa31d9b7a74fc12a100f4fa1380b14696dbc24a5a12e3623fc0ab
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised WordPress installations, suggesting an attempt to leverage legitimate but compromised infrastructure for malicious purposes. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or tracking mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://crewmak.ru/uplcv?utm_term=install+widgets+android PDF link annotation
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62421985975.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/92850165801.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/ditefineginabutikobajegu.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/botojepujogavotureraj.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/poditogaguroniwa.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614347ac9688e---28506239713.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/5828b613bb7f44390bfa2bd64a53a7b6/tozolixavazes.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/kaliz.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/96336565802.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/35438408540.pdfIn PDF document text
    • http://imbirimbir.ru/files/gidopepitepur.pdfIn PDF document text
    • https://soechi.id/userfiles/file/43864213789.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/dexuwegesa.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/galesaduxubuzilosebowuzax.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/13363735755.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/julevirubef.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210918120929.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140f06cafbdb---26186580817.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/rediwevodanituzudej.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/9313859743.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/22463135585.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/52737531546.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/bavuf.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613879af61703---49570347154.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/lusipigifakawigib.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/zimugupusimuxasixewojufu.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_off0000b51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD31 10460 bytes
SHA-256: 892674484d046e6cecbcec93e7845822382f461a576220175acee8ab03776702
font_02_sfnt_off0000e4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E0 16984 bytes
SHA-256: a2b348f20f0ab77587f8075c61706de0976cd7d36bef7b9954c7277dc1557111

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