Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6d03364d928911…

MALICIOUS

PDF

72.0 KB Created: 2021-09-28 03:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c904fa925a411a8b9f353ff8076a483 SHA-1: 8ac3edbca609b134c64e5c49029af4d4d5d099f0 SHA-256: ce6d03364d928911288643bb9cd2524aaf9673c8c7b3b85f5d91af3d082a553d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://alrabbancapital.com/file/files/donetizuromenoj.pdf
    • http://kunjipsc.com/uploads/files/48763988307.pdf
    • http://meghdoothsuzuki.com/uploads/10975806117.pdf
    • https://sayurmateng.com/contents/files/82005700915.pdf
    • http://kystar.net/filespath/files/20210916195856.pdf
    • http://bftt.marketsearching.com/upload/files/51924475887.pdf
    • https://copab.tn/216mag.svn/uploads/files/kexuwo.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614d9a2070479---99605443002.pdf
    • http://xn--h49al71atridzo.com/userData/board/file/47178842401.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614388827a05c---67265762985.pdf
    • https://digiconelectronics.com/media/furijozekevukagijesube.pdf
    • https://jobtiara.com/files/files/14917480057.pdf
    • http://bet-balance.com/userfiles/file/kofavawat.pdf
    • http://kraski-chernila.ru/resources/file/36148211300.pdf
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/46298703143.pdf
    • http://travelspace.pl/userfiles/file/navowiso.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/a7cacddd6ec26dd1181018b99351a8eb/gelene.pdf
    • http://ayurveda-shiatsu-nice.com/upload/files/9484900843.pdf
    • http://kirilmazbardak.com/userfiles/file/pogaxodakedagetojigexoka.pdf
    • https://virtrade.gr/userfiles_lybo/file/tufexepex.pdf
    • http://erfanekeshmiri.ir/userfiles/file/30109208745.pdf
    • http://styrexon.cz/userfiles/file/xizolobazizifepulofaza.pdf
    • http://leeandrewdavison.com/download/jajifuvazuxevanuxewiv.pdf
    • https://khangle.vn/uploads/images/files/nesanebaza.pdf
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/34815459377.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=bin+bulaye+baraati+full+movie+hd+1080p+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b49e.bin
b7a4b35da26efa8d6688a3a98da4f85caee35377b3c1cb9aa1f47d88ab29abd1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB49E 11536 bytes
font_01_sfnt_off0000cfa7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA7 16792 bytes
font_02_sfnt_off0000e7b9.bin
c25554bd48beb28a584102b9019538532f95215099cedf52a31a8226fb880e36
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B9 16252 bytes