Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d60be46393867e7…

MALICIOUS

PDF

95.8 KB Created: 2021-07-02 06:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84a666f7b372cb6ab0e752e1ad7539bc SHA-1: 7e21132428f582a520a3991f8c62b36d858d3cff SHA-256: 4d60be46393867e7ea45b81ba338ec583c7b346a85c4d1ca43fa13d96c18ca2c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content or further stages of an attack. The presence of external URIs and link farms suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://kath-kiga-bw.de/bilder/berichte/file/96747202531.pdf
    • http://bright-mineral.com/uploadfile/file/2021062601544714.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089f60456478---56201905202.pdf
    • http://taxiluzern.ch/khurasan/userfiles/files/54963230409.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608355eb7f957---21624584165.pdf
    • http://blackwingsexpress.com/upload/userfiles/files/gijewowaxatusazabefarafa.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160baf3f0298b7---94670017352.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8798ebb7c---totelofavujelalax.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/ec340594155140f4b4e099d8cc6826f1/wutexuvarutawuwe.pdf
    • http://polletnv.be/uploads/files/matupotawujo.pdf
    • http://vtaky.sk/media/file/nenifakubofed.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc440b2f3---54219577954.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e156dbee52---7598352113.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/e330a76c7987c3b05f421318601ab9e5/gujora.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d7602f3e062---91922319346.pdf
    • http://anhbanglaw.com/userfiles/file/mediwalabi.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5be95a28d---54423185182.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f95d4011db---dixadakezat.pdf
    • http://jrmhandling.nl/upload/file/52761192057.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cb6e615e0---gofafokigalupumisuka.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/7936603300.pdf
    • https://aokman-drive.com/d/files/lugelolapif.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/ba5f829e279b7b9b1dc1d7a6b142c399/rezusukulatine.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16080ca4b18f67---94734576554.pdf
    • http://ownlines.com/upfiles/file/68403987821.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072438bc5428---80266483740.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdf51cd54c---kabuzexejuzerisug.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=morty+and+stacy
    • 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_off0001178f.bin
8bb2994ac9e9713783bbedab45497f1efa96c77ec122cf1bf0579483095fe804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1178F 16636 bytes
font_01_sfnt_off000142d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142D3 16792 bytes
font_02_sfnt_off00015aea.bin
9fedd97c2b7ee850ff1040a2c621afed53a1555549308e73e6792818fbe61284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AEA 10200 bytes

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