Malicious PDF — malware analysis report

Static analysis result for SHA-256 feafba06200bf653…

MALICIOUS

PDF

81.6 KB Created: 2021-09-03 13:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b39adb6b165e0c577440f6a44e2d1608 SHA-1: 1ab79368a71777fd74bdd94d2ed4937d8ade8ef8 SHA-256: feafba06200bf6536fe564b86b2a4a28ee1fe85545a2b0b795e6cc91ff8b85fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, forming a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be phishing or malware distribution through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pixomot.ru/uplcv?utm_term=constat+francais+pdf PDF link annotation
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160779b95b3339---bofozexagobeto.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/749sijkrvnci2a5vh69ifdfs5l/vapukamidi.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ohsk43dgaca1q5fvuqf83qmf42/matilagiz.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/13639399261.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/fezutawajomosugag.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca234215268---dukavuwuripoj.pdfIn PDF document text
    • http://soupworld.de/upload/file/tololaxanulinesoz.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/83423011352.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/tevolez.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/tunawowexugipojup.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71cd2ab39e---wejerikesiwabum.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/gafobebum.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/femobixifepanosozojikoz.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/xesikuxewiwe.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/86925922047.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ccee8ef2f6a---74278895850.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/datapetorizorawulug.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/rubobojibevegofasifivim.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/70969578771.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/79526517663.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/79634811315.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/fakomugumozojudufi.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_off0000d5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 19712 bytes
SHA-256: 919a7a0666cde0d03cb175b224f6e0cd63f7d62ef4d15c985d7ba78add5ea77e
font_01_sfnt_off000107ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC5 10468 bytes
SHA-256: aa4c073746f1b24ff946f000865448003c8a95ee40e4e311e48d59ee78f5bf28

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