Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c82925f5a96e5c…

MALICIOUS

PDF

128.6 KB Created: 2021-07-14 01:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 58bfaa069a5d71b7b513a28827b95990 SHA-1: 99e4cf6d4cb89a4520461d4321bd0ba7cd352701 SHA-256: 29c82925f5a96e5c2e85065203e303377819574de5c472c15b137be5871ac481
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and domains, identified by heuristics as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of multiple external URIs and a link farm structure suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://cuisinescartier.ca/upload/editor/file/xiguniwozijulovuxaxakexu.pdf In PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608665f291273---veleximokipavut.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8e58819cf---witevefu.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/32986574361.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082913799e02---ziwuvu.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/56334675851.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608058b3da8c0---zotosumusolamikusatu.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/vixuzokibon.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee06680ac7f---sajoliwogopigebeparojor.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/rimoze.pdfIn PDF document text
    • https://ubranni.com/uploader/files/mogamodirosum.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/86tp541gepnalg0ci8muhjbsb0/90991495328.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/regonowarutexefiru.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/fadafebirulunetomuvafed.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2515d5b8aa---85513977390.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbb6fdb03a---9280152892.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c6caf935---xafomakaladipuwowusefaki.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/julujolajoselavapiwoxoj.pdfIn PDF document text
    • https://midasspa.com/ckfinder/userfiles/files/xewonaterulejete.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/nemadinexosifugabemukowe.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a6ec194da---94922639592.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/doradelivawivilemuza.pdfIn PDF document text
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/fedakadamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=from+competitive+advantage+to+corporate+strategy+pdfPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001936b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1936B 11072 bytes
SHA-256: ab78bc976451787c32b7a3eadbcc4ea4bf393842bf038a9169bf8c7f65f4b9ae
font_01_sfnt_off0001ad09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD09 18156 bytes
SHA-256: 3d4335afc1c1b916c21abe57a0ff5e5f8e44f1817aebddd02979fad9f7cb6cfb
font_02_sfnt_off0001dc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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