Malicious PDF — malware analysis report

Static analysis result for SHA-256 f476022b594b29f5…

MALICIOUS

PDF

76.2 KB Created: 2021-09-13 06:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 14d40bab06da86c2aa66997d26caf052 SHA-1: 582c93259fed2be8ebccce610f1434a69a22efde SHA-256: f476022b594b29f523774bd3cc024f2e3d72c9931260a89d642beab2072965a1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and is flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it functions as a link farm, likely directing users to malicious sites. The ML classifier also strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae664d1f8d---19432046197.pdf In PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/jiditafigovulamuku.pdfIn PDF document text
    • http://evola.it/userfiles/files/9643789021.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/siramiwe.pdfIn PDF document text
    • https://mmszke.hu/files/file/17429024255.pdfIn PDF document text
    • http://skolky.info/foto/images/file/xobodugagegu.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/98680313760.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/wazepod.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/dafasoxagixawenalelonag.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/lajud.pdfIn PDF document text
    • https://conrays.ru/f/data/3592300911.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/nilabufovokolev.pdfIn PDF document text
    • https://ccskin.com/geektic/files/muxiluzu.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/gepeja.pdfIn PDF document text
    • http://renknh.com/ckupload/files/43473934171.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/fudoge.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613461b1dcb8e---suwosogofubigal.pdfIn PDF document text
    • https://dyaa.club/uploads/file/36559638570.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/xupesuri.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/49688640284.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/65817299149.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/41808308023.pdfIn PDF document text
    • https://zenithservicos.com/userfiles/files/regiregusetexataro.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/93990759928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=hiroshima+no+pika+pdfPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/38708633473.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_off0000c46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46B 18128 bytes
SHA-256: d924a3e8694628ea0bc1a7cb418f0e2df0973650eaa18ed8a6436d901d70c82d
font_01_sfnt_off0000f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF385 10568 bytes
SHA-256: ef40786a3bd7ed30644fb2c319f9144848a0a337b6f52873e717b0a2d7e68a04
font_02_sfnt_off00010b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1