Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd012268b12e1651…

MALICIOUS

PDF

90.7 KB Created: 2021-08-04 03:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 36e8f0a4d6446e88ad588883c62df71b SHA-1: 88f835c7e01a3f323b09a6bcac4a08c170085d4f SHA-256: fd012268b12e16518f8354f2c279560913eb5dd1c369e1b9f9e631f70e279a81
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the link farm structure is sufficient evidence of malicious activity.

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 http://andlupa.com/userfiles/file/pitoriguponadupivuk.pdf In PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f04f3552bd2---72841459089.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/dcb48bf06e04d4d3c1276a487ee6dcae/zuweloxa.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/11482069430.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942f595f801---80630154584.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/puvesufikoxakowepuxipud.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/b28c471c52a1395b2825a7950cbc2ad2/koxaparefanovasom.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/25c4e118c6659cf4db3ecd24c7bd1f3e/77986163861.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/a054185fe3091726943f9c32548046ee/11778452549.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/8ge14e6gh202q9j6llb40mvcim/jefinor.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92bc65ccc0---fegemimerakoxer.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/c5dead2fc2de996fef0e26bb252d2aaf/27204472673.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/rinevetabusefij.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/jerolakevado.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/wupogulejime.pdfIn PDF document text
    • http://skupka54.ru/upload/m/dikosabemerepegun.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/dikibep.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/gimilinixirogak.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/xuxazofisedirogedeto.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/35866307182.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/f3001778fe2657d8b4293e1f86658d79/6380985947.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/fewevunivofedibajogow.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fa9337079---wajurifigupuzaxurigekan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=catcher+in+the+rye+audiobook+chapter+23PDF 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_off0000fdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E9 17336 bytes
SHA-256: 3b150c706e307b11bbae3215998e12d45f26e4f950a93672c7d8a2398066b865
font_02_sfnt_off00014335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14335 11168 bytes
SHA-256: 198c50318dcf52fc595c126c05e800fcada000ed84386dec8d5b66f07fa0a2f7

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