Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ede78978297f53…

MALICIOUS

PDF

82.5 KB Created: 2021-09-17 14:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 69e1ba98c4b77c1ab1047598f4608147 SHA-1: 3fc839fc53556c0a725e5690b648f38fbc81fb0d SHA-256: 86ede78978297f533475517490d1c35a0b78f57e6d3f1560cf098f9f4de59f4a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which are to disposable domains, suggesting a link farm or phishing attempt. The presence of a URL related to downloading a game, combined with the ClamAV detection and ML classifier flagging, indicates a malicious intent to trick users into downloading potentially harmful content. No scripts were extracted, but the document structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://snapstudios.ca/userfiles/file/fopeni.pdf In PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/30076107060.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/25817611700.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/xakoz.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95649641494.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f22f28ebd3---namuwagekuxowono.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/wewuk.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/86375386154.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/20360510406.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/nuzid.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/zalulewegunolajab.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210901151138.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/nutagupaxag.pdfIn PDF document text
    • https://umutfm.com/resimler/files/29245779308.pdfIn PDF document text
    • http://vaynhe.com/upload/files/xezonuluw.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144515162403---wanarofiwar.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/28248249293.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/7669381812.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/xunilotexetum.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/tororiwijokidepavi.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/bitunisoseso.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/lawudazeriw.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/62231193865.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+game+god+of+war+ghost+of+sparta+ppsspp+androidPDF 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_off0000db43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB43 18232 bytes
SHA-256: e8e9d68d379993987e52eb68eb7efbd7c0762da728382bcea131e8fefd45fe7b
font_01_sfnt_off00010b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001232d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232D 11032 bytes
SHA-256: 4e3c5e41c4b36561095357f4823dddf953c6f237947e6ea43dc7117d8349ce20