Malicious PDF — malware analysis report

Static analysis result for SHA-256 560f5cbfb8673ed6…

MALICIOUS

PDF

83.6 KB Created: 2021-09-06 11:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 78ac9a338090c59b84622ff63d2d7e21 SHA-1: bd74e0041cb9b821ac9698538a7e105251b2549b SHA-256: 560f5cbfb8673ed6e95ef5cd7fcf8e2e517ee18c3c24cab8bed0e6ae34b88124
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to lead users to malicious content, likely for phishing or to download further malware.

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://archism.ru/uplcv?utm_term=upsc+modern+history+questions+pdf PDF link annotation
    • http://celcg.pl/uploaded/file/nalobonikigeza.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/72fef6add192e46b0e460a6c1af8ceb0/82555809733.pdfIn PDF document text
    • http://frappsreagent.com/upload/files/kikab.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608307f4de986---3075623223.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b419cdd2---89630219823.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/86321983177.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/23179648384.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949191399b1---14522793770.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16080e189975f1---kuwugukovizafodukogipefa.pdfIn PDF document text
    • http://gdaniec.com/upload/files/zewupetaturulexojosik.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/34574335540.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/61d756e88b8b56530f7e5768bb6f629f/36771213244.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad3004080---63791968770.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/0a335591dfd4af1e8a7f70a8df876bc0/73458359369.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1620525457.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8ac9cb72e---78108130627.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/76937392169.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160acfc06c8cc0---wozexowipalurimunanewi.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/57760741809.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a64d5552da---76390445492.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/moluzuz.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160eca963bc889---wupegizidezo.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff83029bac---fosizosokekufadumurone.pdfIn PDF document text
    • http://gchs1966.com/clients/2/2f/2f663f305105093038a7fc4b193dd8f8/File/farenedipivuposusita.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_off0000e2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 17024 bytes
SHA-256: 09967629f6166f3a54780044bd0fae6c90da896aeebe146887c74cf3a29e41d4
font_01_sfnt_off00010f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F04 11044 bytes
SHA-256: f75a6bff258230af8d042f64f58c5a022c789ffb8232c7ff9ef78f61375ccf7b
font_02_sfnt_off00012857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12857 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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