Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67fd0702ed71568…

MALICIOUS

PDF

70.2 KB Created: 2021-09-28 03:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7a02a7824115b5dcb837ab9a87cd15de SHA-1: ceda78848e1cf8d3f9fe35720c04c5696e7f5201 SHA-256: c67fd0702ed715684437c218a6ee32d2a0ce4394aea0c305df757f5d7bf93738
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains a link farm pointing to compromised WordPress sites and disposable hosting, likely intended to trick users into downloading further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic of encrypting payloads to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gzpropellers.com/uploadfile/files/bajig.pdf In PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b66c4ed362---sazoxarutagumunuzarutapuk.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/44786223925.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3c5f23878---mesazadidogozituvifefak.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/5cf21393064b4e2630fbf20cca7aca53/12821172076.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/jikowazidif.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/15330302820.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/wedudena.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/83842496615.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614e6a2176584---97806450422.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/buxak.pdfIn PDF document text
    • https://nistd.in/userfiles/file/datuxa.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/perarozafomaf.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/nugimugalubojobiv.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/73afce6f854c48b894f66d3844eba4ab/wexazesamejizite.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/46109284804.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/83021684931.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/farugipusikusedoz.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/tekanuwagujerivesafamo.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/xifozudawetelibe.pdfIn PDF document text
    • http://efeteknikyapi.com/userfiles/files/31630246298.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/a3770410e294343fa309065e5286e22b/4146116490.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=best+free+action+game+for+androidPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/viwolifinugabun.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_off0000b047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB047 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85E 10828 bytes
SHA-256: 46c3334a8f99e7259a9e5397916c77cb3a85e13f7d9ed2b262935b93329668bb
font_02_sfnt_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 16680 bytes
SHA-256: 7f677884c2831892f49ef9dc3447f4cb7d4da42806c3580947f44bcf6bb31f27