Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef47f226dbf1db9…

MALICIOUS

PDF

82.9 KB Created: 2021-08-25 21:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6fb752dc0a76cb7f4e7fb4f43637af1a SHA-1: d4e6cbe6cec33a739962afb420ff17ce12a312de SHA-256: bef47f226dbf1db9e0a280af3b198d3391028fed964336812583e08a19ecb127
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aadd5dcb9c3---fogokosexofegakejojoxanem.pdf In PDF document text
    • http://lubrifianti-auto.ro/files/file/55232054823.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a245b1d04c0---48752750571.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160abd8a0ab2bc---62999853587.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/gubetuvole.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/sesufedid.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/32631892309.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/mumasus.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/firik.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/foxasukefepiwagoto.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/11167354266.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/68864154082.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/a43ca0e1df6986d0d099b193dfe66dfd/marovipezobebosa.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/gulivikaweli.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609456714e7e3---72280411273.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/sho8qcpq15cev16glpf85sdbg0/supepomipivefup.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/3ec05ef3074f704a7fa33c8d141afdbb/98518162678.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074709f15ac9---29022086242.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9f07e572e---183016934.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/12018159410.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/dagoxutodovap.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/40333291408.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740f005c37a---badijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=icse+class+10+maths+sample+papers+with+answersPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/53227145794.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA52 10732 bytes
SHA-256: 977360f8c10e73d4d5dab16bf52a219a5370de2f307f51b9e5a06257c8c11fbe
font_02_sfnt_off000112e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E3 16524 bytes
SHA-256: 918e4baca2169e0fda3d2da8bde6c5d61b29716a01399e271d9b712d7d3c4e6f

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