Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea864d8bd4717cb…

MALICIOUS

PDF

83.5 KB Created: 2021-09-06 21:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 77a5f3b5ca26620a5588df939fb3c1b3 SHA-1: 8758297289ab780cba94b61ebb39d13ff9c52e5e SHA-256: 8ea864d8bd4717cbb7ce8cdaf4d3bab0b8a9d64e876c71639c60c6a1b9547aea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609bff56e9e99---jeweli.pdf In PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/xajarovakusozixukomulom.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4219b85aed---vegin.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/gosuxalijalofuz.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/buvetinazunozebiruvemefe.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/tabono.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/8vomplcj1vap370r37paial2oi/88745873520.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/22375f020fc268143c59d3c12af5cb5e/22447561885.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/90178863266.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/linafavimomajimute.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/gimoraw.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e00601a059---fewasizesikasinojowika.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/0j70mub6agvp7spcef9a83nobk/tukujer.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/dabodinawosepiladorid.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/63447841737.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a516f7d593f---mewezimaloj.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/23afd2cfab7c51d362e21a7f49e2fc0e/45814500963.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/vgt0auqlva4cs39u7noe1cu6jb/91201348631.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/999dda9cdfa0d69abdaf8a64bbda7119/97761281303.pdfIn PDF document text
    • http://envigest.cz/upload/file/67451410147.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/qre74b0hve426u4v6hmqun0nvr/xobejoridibizorotowi.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b31645cb04a---79501628660.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/e5768143fae3852bb00dceb40fd3e142/vifasenuvedijetugove.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/gaxabaserug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=fine+art+portrait+photography+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_off0000e593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE593 10656 bytes
SHA-256: 7c6c66bdab035c88d49a23543911627e714d4baede0b7f04f558a2fbabd54dc2
font_01_sfnt_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C0 16572 bytes
SHA-256: b0c6a5bd431e40e443b829c6b15180b41798693c96ca649ce34efc98d054bc59

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