Malicious PDF — malware analysis report

Static analysis result for SHA-256 95690718eafad7cd…

MALICIOUS

PDF

89.0 KB Created: 2021-09-03 02:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6f464dbc763f8ce837fb943cc204888 SHA-1: 2c26c95e0184721f92d36a8ed2a138064ab1f1e0 SHA-256: 95690718eafad7cd516d558b82fd815d687365fa8b091a5011b6c5f4ee4520ce
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable binary data, but the heuristics and URL analysis strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://pizzeria-millemiglia.de/app/webroot/img/editor/file/30933720936.pdf
    • http://atek-ent.com/upload/file/vogajuwamoragil.pdf
    • http://oumkua.com/userfiles/file/mimovobewakinima.pdf
    • https://smithsgame.com/calisma2/files/uploads/petin.pdf
    • http://cbcom.fr/ressource/site-image/files/34743970265.pdf
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/88070850179.pdf
    • http://2ds-creations.fr/userfiles/file/kakekak.pdf
    • http://inciboya.com/resimler/site/files/kupivipavogogo.pdf
    • http://madiagranitosilano.it/userfiles/files/22875494740.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/b902fc02629f8eb066d9986e32967c0c/tekodegamedanowadikemoloz.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/cf6bbdb4fa9057a89ba1a4c54e8eb02d/wagobuwaporukateb.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29ebb61d70---jiwuluruvadimekalipat.pdf
    • http://alompar.hu/uploads/content_files/files/63713146561.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/14ec35fa90f39e812c2a8b140a8fee34/divomewutatowasuvubi.pdf
    • http://daedukgs.com/admin/fckeditor/data/file/20210701064723.pdf
    • http://plenerowe.kbo.pl/ckfinder/userfiles/files/619878082.pdf
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/zejomubijazerudefoz.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095ecd39c9dc---66506675686.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64c2e59ecf---niguganozadotewoja.pdf
    • https://cecprint.com/images/file/mikijezetugumoxitadexet.pdf
    • http://mikomisushi.com/uploads/files/84294697295.pdf
    • https://twinscooking.nl/twins/userfiles/file/65723010429.pdf
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/66087558208.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=fichero+de+experimentos+para+preescolar+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 16792 bytes
font_01_sfnt_off00010840.bin
f2e475d66b330c12186c1307824000d1e2678faa055fe74c2c6fb77697150fed
pdf-font-stream PDF embedded font (sfnt) at offset 0x10840 19780 bytes
font_02_sfnt_off00013b44.bin
8f96f21356a1fe2f5001247b0d56e945e247480920c23a299b58e22bd83186c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B44 10964 bytes