Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c52fb6477fda33…

MALICIOUS

PDF

76.1 KB Created: 2021-09-15 21:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9214ad9ed32f754c6cdcc4f3ceddefad SHA-1: 89f716053c42d907ea321825453662547f1c085c SHA-256: 16c52fb6477fda33621ececa2b5af3bf92880f56cb3bc46d4a428f832b006ac6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URIs pointing to various domains, likely to distribute malicious content or phish for information. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, noting the presence of many distinct hosts with single links, a common tactic for evading detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=sites+similar+to+putlocker PDF link annotation
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b31c66ccfbd9f8fb5fdf6af281f29919/veleted.pdfIn PDF document text
    • http://2013.letnifestiwal.pl/ckfinder/userfiles/files/76855607423.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/24980339736.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder/userfiles/files/18565686497.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210901_57E97F2324506C4B.pdfIn PDF document text
    • http://forspeed.cz/ckfinder/userfiles/files/fakijanaduraje.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/16535912083.pdfIn PDF document text
    • https://suksesunited.com/contents/files/60240328110.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021090922335273499.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/ninatumotasovubosoluk.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/47959107983.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/faramanoka.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/78785029710.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/10458432998.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/415010_leduboxidelunoketolixuwol.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/wutajame.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/jubovit.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/gizofeketoxakukalupak.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/nupojogesevub.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/gulojipatarukal.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/fatexezanexemoluf.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/fuxirawi.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/94660864092.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/60415933471.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_off0000c6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 16756 bytes
SHA-256: 7250a74ed6895518ea1cb475d687368c13680fc80ed958511db9fb53aa187f49
font_02_sfnt_off000109e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E1 10700 bytes
SHA-256: bb5dbf568d1d9e37b06bdfc313f6d39d02c90637d726c51fca404b7cff1558cc

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