Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d3fd6021ff09b4…

MALICIOUS

PDF

90.3 KB Created: 2021-07-19 10:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1facdf59f7a56631ade826648ac31402 SHA-1: dbfd7f17fcd2786f5fd1ba061a200a8930e26129 SHA-256: c6d3fd6021ff09b4954eb9f095fc3e3d84ffca9116fce7c6bfe5c8e68b1b027c
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with high-confidence heuristics indicating it functions as a link farm pointing to compromised WordPress upload storage. The embedded URLs suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b92e3ceb9---xizaferivonaxuniruta.pdf In PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/bibetejedonumerodezevolut.pdfIn PDF document text
    • http://zanhotel.ro/beficientconsultingFiles/file/zemewitekekaxokew.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16099b7c3d87a6---90283896792.pdfIn PDF document text
    • http://orthopediedelft.eu/files/61941851498.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/lakizo.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/4283318700.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a5ff44d7e---31488532461.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/vofave.pdfIn PDF document text
    • https://hocngoaingu123.com/upload/files/76960190525.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c2b4902ea---22837641378.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed2af09f9f---33934763520.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/fec9d0826083cc51624d5679565c0d5d/lekexodepi.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/lukezer.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c962b78a311---35431151356.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/77072979183.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/b50a98ca38dc866fad2edd8d9a134020/gikisavike.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b7566bc3871---favebovukoregexudobinebop.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/8984a561584f41adb15d75eacb76217e/80763659796.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160795c5e29fa5---65461167882.pdfIn PDF document text
    • https://sinarwaja.com/account/files/14951050906.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab75936d21b---loxipamoduguvofarovizibeg.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e7f88d6fcc8---lodolirefekalorudogovoz.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a320b56e71f---xazedaz.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/b6546e2b69a43e2aacc115c6d2b0a2d3/94661691047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ogt+science+study+guidePDF link annotation
    • 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_off0000fe7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 10356 bytes
SHA-256: 83a90a5d4fcf4f31efe6093014441a18f67c2d8aa83236e382f880c25ded1e9b
font_01_sfnt_off000115e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E7 17420 bytes
SHA-256: a0c738c18ab69ab5720c8dbd8d1dc9b266058cd9bee6b55beeafab210ba2a875
font_02_sfnt_off00014295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14295 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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