Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebaf442939224d23…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 12:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 006ddace9fcdb02e4265ec52a2e58525 SHA-1: 017783a74bf10b5f28abe4d21c9426791d37a1d5 SHA-256: ebaf442939224d23a5fc9704b15d74a517282700705132219995ae17873293d9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded URLs, many pointing to potentially disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • 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.
  • 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://poojaindiangrill.com/nbloom/fckuploads/file/80970608833.pdf In PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/82506628655.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/86817728080.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/67476285382.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138bf4fcf1bc---saxokuvivizaxunabunijibux.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/dojidam.pdfIn PDF document text
    • https://e-room.co/userfiles/file/50795988030.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/dalebewumuvud.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/kidepavesatixez.pdfIn PDF document text
    • http://weingut-suppan.at/files/23745976276.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/2969316718.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/rekomatanom.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/xadowukupuvatedir.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/161351190651ab---ruzejej.pdfIn PDF document text
    • http://naturpix.ch/cmsimages/file/25088996180.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/sedebonuxesako.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/53742766409.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/80420715962.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/54263216364.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/22029959668.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/46588329429.pdfIn PDF document text
    • http://jacsonsfurniture.com/userfiles/file/xebixariwo.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/zazedaguvugugoxedobo.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/lopet.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/94739561959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=cube+3d+shape+examplesPDF 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_off0000d684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD684 10688 bytes
SHA-256: afff560c35a0d56d1f74536cd991a360ae0e0ff9b177f9f996f2abb3c9a10fda
font_01_sfnt_off0000eed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 18348 bytes
SHA-256: 06e0ce84f467c7c10a674d32f3a53a8a6da0c025bf9611594d1ebfc283444411
font_02_sfnt_off00011e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1