Malicious PDF — malware analysis report

Static analysis result for SHA-256 c869c8d12102ab31…

MALICIOUS

PDF

86.9 KB Created: 2021-07-17 11:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2ad9726e1b86cde28efb6c86457e747e SHA-1: 8e676c222c23c7451360bb076f9967e3e5f1615c SHA-256: c869c8d12102ab3149aadb89b67da48dc1208a8055e4cfa2841918008c400dfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers flagged this PDF as malicious, and the presence of numerous external URIs suggests it is designed to redirect users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160f06dc53bcc9---jilupabevujifunere.pdf In PDF document text
    • http://adhdesign.de/userContent/files/20210607224449-6027480617.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/9sk5sfrqn39ls56bnt5k4j04u7/jejeva.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/raj5cud2gvns5718fb5uggq3k4/jefebepiv.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/nedututamabeta.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/6a59857a66d0b25018870f0e6d5845b1/39538535894.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/39667509599.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents//files/tawapedavezu.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9f6fe34b2---58999488995.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/09d7bf9f24dfc4cb65b9658255f691a3/29022231883.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/m82ed5jhkoqq953odchdjjm9re/fazonoposisobujiriviz.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/9fb46fc389372b7a1fbd233977e4e2a4/zasowezilo.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/tetabemal.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/buvul.pdfIn PDF document text
    • https://sukaunited4d.vip/contents//files/kalafedudagajonejubebular.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///zetetatawamubaguperizalo.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b889e1d9f74---43179066157.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/79749070854.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/52721063556.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/61cc9f06c8d916559b07a6b95d44153f/47162732299.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/9c284e43217093fbe1de0e0416026b78/sijox.pdfIn PDF document text
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/94601064619.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ec04c2fad5fe0b868ebc8df8325c31d/2287646032.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/8et9dhc52ot9fngfrbtocoi17n/99271092081.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/73dc9526778c13867d31edd980239c15/zesulunoxidumi.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/wiwimenizaputowepita.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=top+10+cotton+producing+countries+in+the+worldPDF 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_off0000f008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 10956 bytes
SHA-256: 50be7a264f51a80be95ad96d21f804a3fb19e072ab463782015d3da55a5f051d
font_01_sfnt_off00010936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10936 17056 bytes
SHA-256: 212b39502addeee93273fff6e0156b2aa11be64096e663540e4bd9fcf55f606c
font_02_sfnt_off000135b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1