Malicious PDF — malware analysis report

Static analysis result for SHA-256 e984c93a2fdc0d28…

MALICIOUS

PDF

79.7 KB Created: 2021-09-10 14:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: be4e212955d2179329dc07dc8a1ceb69 SHA-1: 2f40fb7722698e1cf84ac0f97f640cebbd62169e SHA-256: e984c93a2fdc0d288cc853e4a2cebf4ad25bf9f1d3717c960111035d447fdb8b
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The presence of multiple disposable hosts and UTM parameters further supports a phishing or SEO poisoning attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c5174a08b---mevopegepa.pdf In PDF document text
    • http://glavis.biz/userfiles/file/98371777730.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/51515750228.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/47898774115.pdfIn PDF document text
    • https://nsaimmigration.com/userfiles/file/16375561273.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/zizavikigifugiwo.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/rosusomow.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/72293403344.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/83298751041.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/sujizupadufabigi.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/famadalasefab.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/29022261020.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/77242349808.pdfIn PDF document text
    • http://apnschool.in/singhania/downloads/file/78227836766.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff8ed49df7---29279881699.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/23256274713.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/55484854260.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/zobeji.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/46357831421.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/82387760536.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/fipekagosomazixiribirobig.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210910114957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=c+programming+pdf+downloadPDF 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_off0000d070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD070 18380 bytes
SHA-256: e02692c9bb720b0c9d7e8a25ab7ba99ac8f2b5ae0f2e3c60cc7da99ff37c602d
font_01_sfnt_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 10560 bytes
SHA-256: 2ce9206bb5e026899c1b709a13f980c7a430b4a58ad18d8a12271c912dfa2169
font_02_sfnt_off00011808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11808 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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