Malicious PDF — malware analysis report

Static analysis result for SHA-256 7238ec3e153f5d90…

MALICIOUS

PDF

85.8 KB Created: 2021-07-14 10:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2d5dbca1af35db33a03c323f02de1725 SHA-1: bbc079eaa7dd554d02de5beda1730a50e2bd33a7 SHA-256: 7238ec3e153f5d904a0fd8694b49550aba24573046687b9162d6763912e3657d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The presence of external URIs and link farm heuristics suggests the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://akemi.ro/hirek/file/gozoxorerogegulonawa.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160986733dc295---11354075861.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/cbc0f80e92e447318fcaa137cb8a2315/61069631047.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebb01be9b7---19975845294.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/sd0ibl12u115jut77o49at64v7/26041840221.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5fc18b4d8---tulokamemijowapataveg.pdfIn PDF document text
    • http://vhktn.at/images/content/files/86542587554.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/blqf5jder6muabt7j9f7uidu0t/82926127809.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/67b2215d05f148155dd62d963e92bdb5/20704231640.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/mixuwogulevazude.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/12974110137.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/qvr4vtd55mjrlujf9eeii69o0c/vabaloruxebavuwozekimo.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/38565719019.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/tolanuzunolagazab.pdfIn PDF document text
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/76194566076.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/jotojegatabavaziz.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/1c50fc680b1314bc70cc396eaae40971/litajajafejorabadena.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc99bb193---mojogesupudezowov.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607edeb587bc1---65686427845.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/968jnq7gjcn8598m801r474ld0/tetax.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/pofuwemijisomak.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/86891101235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=throwing+drills+for+8+year+oldsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 16904 bytes
SHA-256: 7cba02a00729a70a7c083e837b06657f79abbcae262abccf2760382e3ae17e99
font_01_sfnt_off000118b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B0 10908 bytes
SHA-256: 474c71a7ad5b26f70bee696d1efae71397b55fcf5c3d966e4886d1d3777b4747
font_02_sfnt_off000131ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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