Malicious PDF — malware analysis report

Static analysis result for SHA-256 761565ae4dbd027a…

MALICIOUS

PDF

82.3 KB Created: 2021-09-04 00:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7fc2c77d7f144d62f3be617da4e24803 SHA-1: 974ecdfdcd862b3df0ae9b047751a80f45a49651 SHA-256: 761565ae4dbd027abf68c30c731394619bc07347d23fe00f96282219358b320d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially malicious websites. The presence of multiple compromised CMS upload links further supports this, as these are often abused for hosting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pixomot.ru/uplcv?utm_term=basic+computer+course+book+pdf PDF link annotation
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611ead4d1eed8---vorenu.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/tebuw.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/25369308026.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a208b4cae50---60499776553.pdfIn PDF document text
    • https://labelmarket.pl/data/file/suxotovubatujogi.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a284e3d985c---76558708255.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/gubebugikiwejiwen.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ec858f365---34971851022.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1eaba57e1c---lesonolizerinawize.pdfIn PDF document text
    • http://klaaswester.nl/img/file/patapu.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/5755ccc2cd3e4f3b16eb73b6b4a2dbaa/wabepupazifezuzibodorolek.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160874c5f3b851---12809317851.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/nevilixesosoninuravojax.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/00fb485e26b1c08eab42440043d29a7a/wobufaw.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/nigogatumulegedafi.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/78199022154.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/69343705043.pdfIn PDF document text
    • http://keigan-productions.com/clients/863431/File/84952336036.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160abfacf4b1c4---monuzafoxigeja.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0703/92b2e4fef5ae13cfc1b6b6ac93a4104b.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/94700317666.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

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_off0000dc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 11016 bytes
SHA-256: c297a71fa4957d37191d59b3a55ba8af93378821376c0113a16f88c48d06c756
font_02_sfnt_off00010dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEE 17756 bytes
SHA-256: 3b9d8ff1e80d23e506942c9873728b966e17ede5480d0c293d088c9ef67cfedc

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