Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ee6b05c912922d…

MALICIOUS

PDF

80.6 KB Created: 2021-09-17 04:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 810481d76771a1e9e4a838647509ba03 SHA-1: f7ed9c7cc54ae890127f4942576d6169de076ed8 SHA-256: 68ee6b05c912922d18c5d64640804f2ee11862878fe84eae7d41d06de0f1ad11
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of embedded links pointing to various domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating an attempt to distribute malicious content or redirect users to phishing sites. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://stavebnevyrobky.sk/www/upload/files/36409681002.pdf In PDF document text
    • http://dentali.cz/files/files/87016844398.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/20166721583.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/dirige.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/88697700882.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/3981265744.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b8acd94c5---ridarobiveluzekozufutoj.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/vobepifogo.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///pulitavaroxuna.pdfIn PDF document text
    • http://teplospectr.ru/images/files/81322853654.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/65287549657.pdfIn PDF document text
    • http://aquatherm-graz.at/files/98342491470.pdfIn PDF document text
    • https://kimcert.com/E/file/limemasi.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/40087830310.pdfIn PDF document text
    • http://atek-ent.com/upload/file/77214608158.pdfIn PDF document text
    • https://invest.pl/userfiles/file/nojuju.pdfIn PDF document text
    • https://menu2uplus.com/images/file/befunalivikuni.pdfIn PDF document text
    • http://spbi.cz/res/file/45749310713.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/tupelojuduvenonapugiv.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/segatugoxisiwaras.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/96937074994.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/luxilamadusi.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/zilejuxozevofodamizawebav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=pandemic+game+online+unblockedPDF 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_off0000d7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C8 10680 bytes
SHA-256: d2d3471049b8a52fec2b0afb3bf67be3c57e17c4f76d79d4e15cbfb66bbe2221
font_01_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 17172 bytes
SHA-256: 875b0009192345afbbab1d8b1f7189dc82056b11671fdd2cfe154b7087b81c0b
font_02_sfnt_off00011c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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