Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a08057929ab625f…

MALICIOUS

PDF

79.1 KB Created: 2021-09-08 02:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 83dd7c4756b029ac1fa7d0c19021ab77 SHA-1: 8c6ab2dcd6936aa7c0e12ab3a365359869c5bf9c SHA-256: 0a08057929ab625feeca1e0fdb84847968138a94bd14b48027b78171073cfc20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure and URL distribution are typical of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://medvor.ru/uplcv?utm_term=joyful+journey+listening+to+immanuel+pdf PDF link annotation
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/7f62ec69631be8ac14b59f4660ab18d9/kerirasajebujumabiloti.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a42f4c5b776---zojotilewipinewax.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/kosofuvitusisijurugor.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/71543900985.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/dijazexi.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/38577772367.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/98577347834.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/xilesijobuwukitorudapojo.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/4f91fe87c451a17044b231040b19f025/80156944190.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/bbbe4ef5e9d9d48d88fde6dccfdf2b2e/66144173272.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/wokowisuta.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/tipezateribazefalab.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/44109781023.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/ratarapozumerusepula.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608481815795a---89824391895.pdfIn PDF document text
    • https://hotelharmika.com/assets/userfiles/files/22224542399.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/6550750535.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/puvuzezipanidofu.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/wedulodutubugagux.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/zarulidulevezuwujumanez.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210823211810.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/48f0e17d46d70b2eaad1051cc60600e1/ginedikuwegadukek.pdfIn PDF document text
    • https://harom.ro/files/file/zuriwupixojanasad.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/likadekurobajikerovim.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_off0000c892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC892 19680 bytes
SHA-256: d5e296abdc05c04b29ce8482649237de7b1f471dd9c52240cdb472d26544fc11
font_01_sfnt_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 11176 bytes
SHA-256: 8dcf4de8369ba431cf137d100c85262b0f5d934b71cb15d5b1f7aaf0d64789cb
font_02_sfnt_off0001163a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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