Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ded8303b6f6549…

MALICIOUS

PDF

86.9 KB Created: 2021-06-29 23:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9be16be96ce69b45406173e98c8144f0 SHA-1: 9294ffb25887746ac766806b60452edfc2ada45f SHA-256: 84ded8303b6f65495dfb58c82886cf557567b21e5c024f536f62034b2b00b44b
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://edanieltour.com/FileData/ckfinder/files/20210619_EF691AAF2DD72FC0.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/da027fc5e9dbebf1e901fc8402ace1ba/jikuvanim.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf9f743df5---47749844993.pdf
    • http://orchid-daikanyama.com/userfiles/file/xotof.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5daa52672---pozoperanoz.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607196194be0e---mijipereje.pdf
    • http://studiotecnicolari.it/userfiles/files/45522846775.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b44ebed60b2---61961076639.pdf
    • http://terezmisszio.eu/files/file/zuwaverefasowo.pdf
    • http://akcjonariusz.com/UserFiles/file/bajedonakusowepadowibid.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722f14c3d6a---luxuj.pdf
    • https://stancijanegrin.com/UserFiles/files/46500498462.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16096f580324d1---lowotexazeladek.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe95f67b36---25388234529.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609974bf2a241---fevegovukopo.pdf
    • http://travelshops.pl/userfiles/file/61891621695.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0b7271874---tukudiganotufilefad.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f9596b2c4---45237030266.pdf
    • http://techbis.pl/files/file/videnopofof.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/rduium8fdu2nsot3mba1omf9i2/kezoma.pdf
    • https://dansobentre.net/uploads/file/94192899288.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0aec1c429---fosawamo.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8708ebea5---fefuzopibewerowevurojik.pdf
    • http://m2m2design.com/userfiles/40087346406.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=the+mystery+knight
    • 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_off0000f021.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF021 16792 bytes
font_01_sfnt_off00010833.bin
cbdc6ae88029442a0fbd27a38d9727e09a689f9ed65d52cd7efb569e0468b6cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 18888 bytes
font_02_sfnt_off00013742.bin
cb4185c549f5a6b3f85dea65e88fa7922a2e71c07f1a54def23cd4d23c3ca470
pdf-font-stream PDF embedded font (sfnt) at offset 0x13742 10396 bytes