Malicious PDF — malware analysis report

Static analysis result for SHA-256 e569717c06396734…

MALICIOUS

PDF

74.6 KB Created: 2021-09-07 14:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac5a91934f59ce4a5f7fbf4a8b23b5a5 SHA-1: 409830b3512976f24e94f0b7b383f227e9dd3d7b SHA-256: e569717c06396734ae90a7d3309d93681b64d96bd60e8ad3d2821837bf5d8c4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. These links likely serve as a lure to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ff121ab82---lovunusebubozenawa.pdf In PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/82994630634.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/bbbe4ef5e9d9d48d88fde6dccfdf2b2e/66144173272.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/3ada2bf3d10fd3327ab0c5e7ecd655ad/nizisarenagamo.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/60783733864.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/8163346150.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/zibetapagozedober.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/24577097711.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/c3e01a0b068973182eab72f638ee04f5/wazofumobulojutelamukote.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/6a452bd3921fa7dec0127007fcd48a70/ratelew.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/20332687355.pdfIn PDF document text
    • https://castel.ro/userfiles/file/48770672524.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/toshv4l28t2sfq64j0m93tmg16/62169835010.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/gaduvaseginuxunefunudoz.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/49449707519.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb7e542362---64948113956.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/gumevegarokimakesajinabat.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/86666728019.pdfIn PDF document text
    • http://modern-pro.ru/files/file/81670506311.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/80846916040.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/kixovuriza.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210822092230.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/zekikiferigipug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=hypex+ucd180+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC078 10412 bytes
SHA-256: 63b78995a3b12213858fd35534321915ef4349111076e375d4316deb8d0f582d
font_01_sfnt_off0000d839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD839 17492 bytes
SHA-256: 63e34cf6001498b926eef68419c1c5f4d4eb1162ccad10f4feaffe1d04401871
font_02_sfnt_off00010562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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