Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f56b1626328ad80…

MALICIOUS

PDF

89.6 KB Created: 2021-07-08 02:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 085b50ad497c60acc4c9396e3e092bb3 SHA-1: e4a62602c6158f13c784de6b1fa489e1298a01e3 SHA-256: 9f56b1626328ad80326989cf68735ed48091ae3d96a41d6fd38181345008aaad
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://lesen-und-schenken.de/userfiles/files/ziburozupunuwezul.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f644f000d4---gokojenizeginodomeva.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a48ca93d---20033161500.pdf
    • http://fpole.ru/sadm_files/towewuvedavodigedalepo.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce242f0c2be---36110026631.pdf
    • https://eletvital.hu/uploads/files/17301890799.pdf
    • https://biorenta.lt/ckfinder/userfiles/files/44504028871.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/6efdc759f5b90c4b5c19ef72883ffbf1/26188541698.pdf
    • http://www.knickmeier.net/images/pageimg/file/pabozekebejifafano.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baad51a7154---58860794703.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160994340dc126---sofekovopatorulazejunaxob.pdf
    • http://bishnutoursandtravels.in/userfiles/file/63444839437.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7f042d9b1---xafopetesariki.pdf
    • http://detikakdeti.ru/img/file/sukerilojipon.pdf
    • http://chistogood.ru/admin/ckfinder/userfiles/files/38060225750.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097eb8d035d3---32415608628.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074947e76afe---januzatojigazobomojuf.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160890e2390b58---favobisesonigifav.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a58ccdad84---14949975792.pdf
    • http://jrmhandling.nl/upload/file/62119879793.pdf
    • http://jcon-aps.dk/userfiles/file/gofijibaxofigakaxunano.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a67fccb8ead---diniberosunibisizew.pdf
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/65244529028.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=great+dane+lab+mix+for+sale
    • 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_off0000fd51.bin
efc82fc438c7c7658cbae654a2541bb315f6ade880a89cb1bb1c9ba7873f05ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 16668 bytes
font_01_sfnt_off0001284f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1284F 16792 bytes
font_02_sfnt_off00014066.bin
44a2107c2d40a431e172d6baf92ab624b785f0a0a851dd2cdc1445e2aff82076
pdf-font-stream PDF embedded font (sfnt) at offset 0x14066 10796 bytes