Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e28c462a32e43d6…

MALICIOUS

PDF

103.3 KB Created: 2021-06-27 03:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f43f60ca505c930b42673ddc5c4cdb71 SHA-1: d9f2ae99d3a6bac18204c057ae6bc8718efe9ff4 SHA-256: 2e28c462a32e43d6c89dac52611d0bee478102135ccc6eec2eb85da716242c38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution lure. The document body was unreadable, but the presence of numerous external URIs, many hosted on compromised CMS platforms, strongly supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfdbd64460---98989701373.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf69546ea9---33192963449.pdf
    • http://zonazero.es/userfiles/file/rogixuxogevijesiber.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/mb0217d4km0pfcmbk4ant5coi3/sozafexuwajamewanivuva.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909ee0b7e78---34730055095.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/4mf9sehnoocvm06ptqoadlmgan/fetefaw.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/28khgfhhu2a1954stdk91gg5c2/povuwajuvomesital.pdf
    • http://oreade-breche.fr/userfiles/file/revutapurob.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf495ef69f---57332944930.pdf
    • http://ainut.fi/userfiles/file/66621003567.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/635ebc1bd05a4a3879c12c83c102c8d6/59721167571.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/73119903848.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094567b61340---73553901782.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090686eeac26---20563242079.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/32668bf581f6e5020c3f595122bd5bf6/mosisesalufogiva.pdf
    • http://fatamorgana.fr/uploads/assets/file/2631946614.pdf
    • https://ludifrance.fr/userfiles/file/15748852636.pdf
    • https://classconnbio.com/img-jacson/files/dogezasonijilo.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/2a429edfc658bfba142a216d2efbd631/vumarimaxofubiwog.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609146508d434---niwomewixemorozijirige.pdf
    • http://alliusie.com/userfiles/file/31614228569.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073e88ebc3dc---25975831484.pdf
    • https://stallion-international.com/userfiles/file/34070129017.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9d0dfb66---kipuredimuwa.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/aa9a805cfc6201d1bdf5ab674b0e9387/lajal.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa203c45dd---23264006939.pdf
    • https://hosvagyok.hu/userfiles/file/liraretevugivimejepoj.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d9f5207f---29499759167.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=they+that+wait+upon+the+lord+kjv
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F4 16792 bytes
font_01_sfnt_off0001210b.bin
9c8962f9886c8d1355bc2d4f4c61000b44d4550b98c8dece2002d379c70f36dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1210B 10872 bytes
font_02_sfnt_off00013a17.bin
50bf88227892546a8f48dee88773471155c06ca079002c0ad6f729b5803ab111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A17 22208 bytes
font_03_sfnt_off00017185.bin
3edd5d3ec3a42fd58b6a1db3153d89448e8c68a0372f2dd6b3a00ce11dc77c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17185 18376 bytes

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