Malicious PDF — malware analysis report

Static analysis result for SHA-256 42cabcce0d5bacd3…

MALICIOUS

PDF

84.3 KB Created: 2021-09-07 21:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 013b656d11ccf3aa2553a22a72a8d148 SHA-1: 2462f8404ec21c2058242e69be32d1fd37a8cef0 SHA-256: 42cabcce0d5bacd38a027256e9cf9de46739a3b81f2c8be3181a0364b5ac0c11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wingmanplanningdemo.com/userfiles/files/96015848088.pdf In PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/75cc746e8ce14a3cabecd29dc0aaac57/14625408227.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/96931066987.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/97763012440.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87e54cd4dd---nopovaxavosuvixojajit.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/9201161616.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/topixole.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c6f9f1d66---panes.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161217a6e2e7fd---vigabuvosuxinazibafogev.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e10ec1008---64364876114.pdfIn PDF document text
    • https://datajournonepal.org/files/ruveriragezunelinad.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c9595c68a2520aa1416848e176761dea/9040326650.pdfIn PDF document text
    • http://allasclub.com/campannas/file/fujiwe.pdfIn PDF document text
    • http://belloverde.net/emailer/file/xumamoxiwuvano.pdfIn PDF document text
    • https://andrejc.si/files/file/duzavozijufozil.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/u8qtfvpm45qja293ob2trjtn6a/65170789753.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/99920918462.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/4b9e0f8a59f43411760253fec4654981/39027798330.pdfIn PDF document text
    • http://krzeptowski.pl/file/68767844850.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/zofolonod.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/zazinigikozu.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/jupefarigik.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f1d9579e8---49670544560.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/dotuvatawepira.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/melobufogalexaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=crossfire+series+reflected+in+you+pdfPDF 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_off0000e0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C5 19088 bytes
SHA-256: b6117216ddbc066c73eed5166bcbb980b03ce0141c92450a2774938319ac2385
font_02_sfnt_off00012a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A49 10696 bytes
SHA-256: 2976c662499c2d9aed99a17c3d73d9a220da55d735341d4e17d78032ac2a8e4e