Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce954a80084d9d78…

MALICIOUS

PDF

70.0 KB Created: 2021-09-25 11:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1ce64f49dd58ac9e426ffcc29a0675b2 SHA-1: 184370092f02102830151627c54279173545b876 SHA-256: ce954a80084d9d78d5f3d83c74b6135fb8bed8f45b3ab1df1e49f854d3a8c530
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm with numerous URLs hosted on potentially compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://metabolit.ru/files/file/3545312551.pdf In PDF document text
    • https://xn--interpeas-r6a.es/upload/files/robiliji.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/wotezawavanopilawaro.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f784a5a04---69019893649.pdfIn PDF document text
    • http://dongphat.net/upload/files/jofofusu.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/wuvidixi.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/pojudepinokuzekil.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/serexikudifafif.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/gegulik.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/gogavunokapogi.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138aab1c926f---52837712049.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/biletasuvarunuzagumotu.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/rujozozalokadeli.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/mj9kvtauua5fau0rn2pf7ccs4s/13459989277.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210903_776EBEB06A00EE61.pdfIn PDF document text
    • http://knipia.com/userfiles/file/2733556376.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/girabam.pdfIn PDF document text
    • http://imbirimbir.ru/files/vevudegibewosaxabar.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/99631855271.pdfIn PDF document text
    • https://landi-bg.com/images/file/70362836734.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/82804134707.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/22164632812.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/91496660329.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/1456637679.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=justice+league+dark+apokolips+war+streaming+freePDF 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_off0000b42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 11232 bytes
SHA-256: b05747d1b8436ff0a1f47fa4a0e23ed725393afa0428b45868689be49d29324e
font_02_sfnt_off0000e676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE676 14180 bytes
SHA-256: fd74e6d649d4fb9d68fc4074ac951876d3ff4af15c08ad44c2e310d876dec00a