Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d76170c7355760a…

MALICIOUS

PDF

69.8 KB Created: 2021-09-30 13:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e24348678a69753521692a799c5b6d93 SHA-1: 333f820e97e6dd740cb3150666dc0d5863bce970 SHA-256: 0d76170c7355760a01fdc1f4883e07d6ebc8c00d1b4b2b4ed9127c2b9436a5cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attack pattern involving redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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
  • 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://medvor.ru/uplcv?utm_term=file+manager+file+explorer+pro+apk PDF link annotation
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/nekepuxeralobaluxuwekus.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/23648870604.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/lawofotowanigirul.pdfIn PDF document text
    • https://ibextrail.com/editor-images/jesuwez.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc054f033b---19736322972.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/30439651387.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/19476329326.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/nemelutajefebuxizepitidat.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/fixonefi.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/81417809623.pdfIn PDF document text
    • http://chayka-svg.ru/files/27082698256.pdfIn PDF document text
    • http://slovoveri.org/userfiles/4647623282.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/44598739497.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/74141422600.pdfIn PDF document text
    • https://photopoligrafic.ru/ckfinder/userfiles/files/mipeboselojivewujerobixip.pdfIn PDF document text
    • http://immodraft.eu/images/architekten_agentur_images_/file/54281695816.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/kuvenumixo.pdfIn PDF document text
    • http://imoroz.by/upload/file/21787057131.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614b433b95ff8---xezapagapazidirezapawabov.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131e2fc47800---90106551674.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/fajilawifawijawa.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e392871a42---57053029485.pdfIn PDF document text
    • https://foulardfotografando.it/file/55754899491.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16151071265e44---81915704642.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/96845087384.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/reluvogoregig.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/565a4421ffe344d64378362520bd05c3/nekasenixe.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_off0000b346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB346 10608 bytes
SHA-256: 593a3e64db5682db1fc68d99878ac47383e32f46b674e4239f6759b567ef1a8c
font_01_sfnt_off0000cb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE378 15052 bytes
SHA-256: f2e2951d565c56763f2f779d3a26feece39804ba495ad5d32c903870f2ae59e4

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