Malicious PDF — malware analysis report

Static analysis result for SHA-256 5034d496c8a2b78d…

MALICIOUS

PDF

87.8 KB Created: 2021-07-17 15:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0cd0cd3baec24b945f6dce78e33f9099 SHA-1: 4607b879c3e22e35dd4a4395764ada9293a854f3 SHA-256: 5034d496c8a2b78d9c3c5cdf0b50217ee4a810dfa228525c4ea6a536c690c321
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm designed to redirect users. Heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of PRC/3D content and the ML classifier's high confidence score support the classification as malicious. The file is likely a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0858eed1e---donuparewi.pdf
    • http://charivne.info/images/file/2387988997.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/635c805ec2fa185db95100f54edaa889/tigixatedaxuto.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/6d051dc57ce9d8c0a01393d6931db4d6/sujegiz.pdf
    • https://zapcdn.space/web/img/podborky/files/vizonida.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/reek3a2t3vgbipdro4sloae597/66874535688.pdf
    • http://accessprecision.com/userfiles/file/juzuzuwamo.pdf
    • http://purefeeling8.com/data/file/29098756169.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/s6krtp9tc0dk7vv4tukhtfrjcf/35417430659.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a8fd5962b---golivemopasatodolikereduz.pdf
    • http://dichvutot99.com/webroot/img/files/46781580258.pdf
    • https://loctra.net/userfiles/file/murutobana.pdf
    • http://absolutelyneon.com/userfiles/file/xelizig.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd0bfa5950---97532778786.pdf
    • http://manavpublicschool.org/manav/userfiles/file/25499786504.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/2544f35d57bc63ea5c8368f7e118cc93/bubaxazopogegimer.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096f88d4e669---42112608838.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/9fea87a18690577045a1456a1b25912a/sujinijiloviluxevubivi.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/73b3ab80697fc746ee99c5c9b8aec2a3/59141206652.pdf
    • https://kurishupally.org/userfiles/file/14164548758.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/veb6ecbd7aug63cgj0j420lq3c/latobat.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6d9d40faf---kutorilixem.pdf
    • http://aarogyamedico.com/userfiles/file/ruwega.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab1d66e80f---bufoxilakep.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=6+elements+of+supply+chain+management
    • 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_off0000f3c3.bin
6fadea150c18b7a3aacc0773affd8733020496054a369362c3b712028e2d0ae7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 16944 bytes
font_01_sfnt_off00011faf.bin
287359a070f14ec4a3c44669e800dafe3c7c73f4f807728bf922b1a7806cbc41
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAF 11112 bytes
font_02_sfnt_off0001397c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1397C 16792 bytes