Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f95c4ad7f4734b…

MALICIOUS

PDF

84.7 KB Created: 2021-07-03 07:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b25259ae53241ebdc71c1fa43e06b626 SHA-1: 340c9b2c1cdb424eef88593763ed499c1b42393e SHA-256: 29f95c4ad7f4734b9a3d8f94ff65a4083232169eb08dc0a994333f85a015fd86
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded links, many of which point to compromised WordPress installations or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings point towards a malicious link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607191217c7c3---jelitora.pdf
    • http://jrmhandling.nl/upload/file/xisame.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/cc93f0f786c9a5f658a18376996d8a75/navivowujuvalikojobaz.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/a1cb45f42c6bdbd79bc4fb66efe93dc0/35877527999.pdf
    • http://thaimassagemodel.com/ckfinder/userfiles/files/galunatepi.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/olhpi8isck508t1u9btfrbf1uq/jezawupiwiririwama.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094676a48cd7---97619918058.pdf
    • http://chataphan.com/file_media/file_image/file/65177187063.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd885cae37a---walomadubakesedu.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f2360c7e6dfe0cef2d161536804e85c3/37479706381.pdf
    • http://travelport.pl/userfiles//file/xuposibanasajipez.pdf
    • http://pn-tech.net/userData/board/file/3421556967.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/7fg7v6n930fj8ltc8l2n30f7b0/befuvixejisagulivir.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160837f0025384---joledubemanasoroniditajuv.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbb11a882f---dulupexanilori.pdf
    • http://buergerforum-tirol.at/file/98095815866.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16098adb912e85---tunonoginifodagivinen.pdf
    • https://arnetbilgisayar.com/upload/ckfinder/files/49996829988.pdf
    • http://congtyvima.com/images/Download/jasisifipejarabu.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/o7tmci69dstoha08epb7546ljv/tazagudo.pdf
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210628_3637FBF3F792477A.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/apano5hdgv64vl49fs0lqocp6s/magujumafeginonejikede.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+formula+for+centripetal+acceleration
    • http://e1pl2.nazwa.pl/busy/fotki/file/legofuzevoketebitup.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_off0000e682.bin
b928334a730dbbe3900e4cff909b1fee780a644e5f57c67f20fa99d2a0510e01
pdf-font-stream PDF embedded font (sfnt) at offset 0xE682 17632 bytes
font_01_sfnt_off00011520.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11520 16792 bytes
font_02_sfnt_off00012d37.bin
6a935bdecac0a9551026d148a8ccc8d1a1147a05902ceaa0c74f400635610c23
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D37 10640 bytes