Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7ec4490d38a67a…

MALICIOUS

PDF

78.2 KB Created: 2021-06-30 10:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 8fbe066f6ac0ffff27de1a99aced694a SHA-1: 7ef69db07eabc549bdf286572cfc88d4a2d09f34 SHA-256: 0b7ec4490d38a67af4c838d1eb6c6e27eb8a5ef3028619556dbfff2b19b60efe
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://allytemp.ru/uplcv?utm_term=bet+of+the+day PDF link annotation
    • http://www.predia.cz/userfiles/file/52343345147.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b013c1219b6---sorufapaloravepivope.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082adf733b9e---vojojololuba.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/38975ad1222595db588f145f0bcf5873/podufelarudiderasukume.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/01fb15db5f3a3aa163dfb9f2fb044c05/gurenebafapaniwuledesaz.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b4e7dd497---55450208002.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160774a50b6f5c---rogizupuse.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/5d8c04567f0192a66d348c8669ce11e8/xukupezimabedos.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cef4525d633---tokoxulawupibunajukumedad.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/6aus3l3kkf8omtfggcqgdla62c/davelujifupume.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b891a7da24---sopisatewejol.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/fesub.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/dasasivirazanosuvesajuki.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/nijimiwisovedodipatanudi.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/91111003976.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608493d9dadca---56200700094.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1837c1710---26955807595.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/35ca93470e7607ca977b9079239188f6/20343124691.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607845374ef91---86362346027.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/85100af304b4e410de924db95ffbc128/7098392807.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/mawoxuwafitipozuzefipas.pdfIn PDF document text
    • http://thedreams.cz/files/7897479100.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/11720901926.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/76562635470.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_off0000cfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE4 10108 bytes
SHA-256: 70775bd2b39d00ddfd39aa095d5f413e88063e18ed32539bdad1c4b6afa08b60
font_01_sfnt_off0000e6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A1 17368 bytes
SHA-256: b6d959c1d285fe9d33157420ca2dde9bc0851f61fbe93ce00103a3a43c9ebe9c
font_02_sfnt_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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