Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d2ae7682de64e6…

MALICIOUS

PDF

94.2 KB Created: 2021-09-17 17:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1a9e874f30c237d59fa5cc9f9d772b5e SHA-1: e959934a3e8e464b01db3c5ad7777f247c364a93 SHA-256: 76d2ae7682de64e632c648f6e4b185f369671e238cc1026125f5fcd6a6cb0ae3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. The file's structure and URL patterns suggest it's part of a campaign to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://europawindow.com/app/webroot/img/main_content/files/pirirutuze.pdf In PDF document text
    • http://sevoir.hu/uploads/file/28768722295.pdfIn PDF document text
    • https://samajsutra.com/userfiles/files/vobutalevipiviritoga.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/xigeteramobiregoxa.pdfIn PDF document text
    • https://mkontakt.com/dat/file/virugulazukeneb.pdfIn PDF document text
    • https://taumed.kz/upload/2021/09files/2109060004513400436v4or.pdfIn PDF document text
    • https://doitoutdoorz.com/file/Jb8ofxiV3AOqXNn8.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/87958094839.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/pomove.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/dvbp76g2398lsgq4qtn33gujs1/60961607193.pdfIn PDF document text
    • http://efcosmetic.com/uploadfile/files/rogusiganimejoboxusewisi.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/dusanexanusoni.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dfb738fd2---pibideg.pdfIn PDF document text
    • http://hexindechem.com/upload/files/10825421919.pdfIn PDF document text
    • http://xmst.com.vn/app/webroot/uploads/files/22862354222.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/52801138664.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/lapokudixavese.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/zepomod.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/9rv2gohsl0tgafjfh5mj21oih3/wotike.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/31463630311.pdfIn PDF document text
    • http://119pump.net/d/files/foxuveko.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/83800419834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=photo+video+maker+with+music+apk+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_off00010774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10774 19236 bytes
SHA-256: 5520aef8466c20ac7b4d7625af1307f8b72969bf4abdc31815ee88ddb6c0fd26
font_01_sfnt_off0001390d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15124 11124 bytes
SHA-256: a5339198eeab2caf87f05ce07605feed86eb654b745af97dbcfe9c8eaa01f608