Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c286c5c075bf93f…

MALICIOUS

PDF

91.1 KB Created: 2021-09-07 13:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cf78f210700762d03684fcfe4aa70a5e SHA-1: 101217ae2308ae8baa56994fd00f6dc4c7073ce4 SHA-256: 8c286c5c075bf93f1029a0a1b8e3da53f8d8348808d0ba9514d2855cf6c12fa7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress sites using the Formcraft plugin, suggesting a link farm or phishing lure. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an attempt to manipulate search engine results or direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f68a805667---wijupoxakewujumukuwuz.pdf In PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/fomefigoxarevovonazivid.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160887cfd9240c---94805346435.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/vapiwenafapewegafelodif.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/denabejipoza.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f61f761930---pivejaputinapimi.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/68580598961.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/8b1512dff96a715b07e9ea0d22709de4/26210530723.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/dukalusa.pdfIn PDF document text
    • http://belovosushi.ru/files/rijalifopago.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/96091084084.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076e2e5be3f0---56753588940.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/1c7b8c9b6af8332bb92c9107217c1bb8/78026391400.pdfIn PDF document text
    • http://gawhs80.com/clients/873705/File/47473509878.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/64951535946.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ladc8jiqeqd18eo7q07v5gush3/43561993255.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b653dc76b88---43531530134.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/44084714103.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f702362df347b82e258fced123f20452/gamarajepebojezesigusi.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/31149911293.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/896997fb7cace21bf9337e9e74b1ff31/47668361595.pdfIn PDF document text
    • http://azizolace.cz/images/file/fitufenujawajakumona.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210525063355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=fibromyalgia+diagnosis+pdfPDF 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_off0001000c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11823 10840 bytes
SHA-256: 27123edf885f8dd1efc669fac27b2deecd89523d362264097ebd9cc498c91254
font_02_sfnt_off000130a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A3 17808 bytes
SHA-256: 8404124baca0920e5d342ecc32a8fd37f39c93211b49e95e8b66036fade3839e

Open this report in the interactive analyzer, or submit your own file for analysis.