Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc29c8d1f88f576…

MALICIOUS

PDF

86.1 KB Created: 2021-06-27 22:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5f65799cc1333b318f9ca790751bab2 SHA-1: 11aaf92159ee2e78586a3df47386f468d567ce14 SHA-256: ddc29c8d1f88f5760bbcb4a96120fa6a06467420f7393f91c0fd3ccb3237a28a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique to initiate malicious actions upon opening the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=low+country+boil+recipe
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/3ab324aeb2f0de173bd251431bdb6b1c/51924872113.pdf
    • https://maconlux.lu/userfiles/files/jusujatuzuwoduwari.pdf
    • http://iglozawiercie.pl/zdjecia/file/70723853465.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/19ed26c4fa7da08de85e4da1fbe2d491/batomamixigataf.pdf
    • http://furniture83.com/upload/files/kejikexajole.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/d2c0877badd3abdb26fd9bdb6482180a/22232907903.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e6722beeb---bozonenuzirijum.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/8fc9e1fcfa621ac6401736a660712232/79996716277.pdf
    • https://rinducm1.com/contents//files/munovutorirezitubuwu.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/49fbbcb60900e0ebb4b13f3f9a9a2a06/67210239525.pdf
    • http://rustproofingottawa.com/userfiles/file/papologekabebivifizuv.pdf
    • http://busankid.com/webfiles/board/file///21983542896.pdf
    • http://baohanhranghm.com/upload/img/files/77224796972.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160826ab51132e---38677769485.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/kccsg4gchj2v830udj1208d986/roleratijatibuwefop.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8015c5b42---37186962387.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a0cad1bf668d678985d7d26852efd03/daxezuk.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf2d025341---95573875066.pdf
    • https://octvads.site/js/ckfinder/userfiles/files/96555731853.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2aa93214f---3390674180.pdf
    • https://dienlanhbachkhoa.info/upload/files/61634982625.pdf
    • https://vestol.bg/files/file/dokerixotilusewus.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/916d9fd8fc22b385f3a3974e57b3a139/mobej.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/296bbdeb91e9018ceb8d9503c71bc2ee/wedefojinumuzuwosonexev.pdf
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/66043387638.pdf
    • 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_off0000ee4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 16792 bytes
font_01_sfnt_off0001065d.bin
d5ee95495b585f5b4ffb73d9b92362cad785b3546b5b760611410cb29f75147f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1065D 17232 bytes
font_02_sfnt_off00013379.bin
a46674a525d586258feb6d5095524d69f48f34c9351a2d2e4365b9706ee5fb57
pdf-font-stream PDF embedded font (sfnt) at offset 0x13379 10436 bytes