Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3d83ba12481dfe…

MALICIOUS

PDF

67.9 KB Created: 2021-09-24 19:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1079a9c000faa2f9de720f36d4be5f7b SHA-1: 45b60da278362f3482f7fa3b55573b5b84e431a6 SHA-256: fd3d83ba12481dfe18019f2bc2d2d05928b130460fadd8d1719eecd6cbe448a3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to obscure the true destination through numerous redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://blnk.eu/userfiles/files/sizebadigaverodizob.pdf In PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/44412071118.pdfIn PDF document text
    • https://westech.solar-napkollektor.hu/js/ckfinder/userfiles/files/13434666770.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/72322367276.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/86967657463.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/femutojuxu.pdfIn PDF document text
    • https://kenkochaya.com/user_data/ckfinder/files/86406156013.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/zegexomunilivagajixoroz.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/11458012009.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/bavatitawego.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/nebugitemanawimaxedibujeg.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/52252161727.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/41254484741.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/42489990314.pdfIn PDF document text
    • http://cistenivytahu.cz/upload/file/zosaxarow.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/95c6b68f54dfeea26e334b479d133070/18055397362.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/mukoxotitolu.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/bibivasipewipawefaro.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/48291701309.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/fanuvaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=mobile+gta+v+modPDF 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://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_off0000abb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C3 16712 bytes
SHA-256: e699415f2909bd067b775f0ef7fe300a6c2f2718083871f26dd2c306d8255b0c
font_02_sfnt_off0000eebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBC 10420 bytes
SHA-256: a12c64b0ca043eb263e6c26f6959c7a65d0479cb0ad00003fcf136798ea1436e

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