Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7cc031bade93a8…

MALICIOUS

PDF

89.0 KB Created: 2021-06-28 09:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 68f747ccd74ee1df45181866029bbbb1 SHA-1: 5bf18dbff909a6cdc986abd12cd00460f7c74529 SHA-256: ec7cc031bade93a89d088962def0b75578030a39bbb471728f74d3845380f441
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. These links likely serve to direct users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://wastran.ru/uplcv?utm_term=cooking+chicken+breast+in+dutch+oven PDF link annotation
    • http://dermalab.pl/userfiles/file/74746582170.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e2a7824e1---zujereraser.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-22/20210522214909210308.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acf1cd7bd46---zaxefubukitafumikonope.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886108b7433---2594426251.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/8cd2s9k1a16shit34sl2tu49qm/96646213929.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/50792287140.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/degok.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/cn3vu6iurv60iph44ks79u60e2/60185384399.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/lederokusivas.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098583c561ba---53499770759.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/51912634790.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/ca3c04b1236161737e2fcedabdffa1e9/bajusefe.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/4e2ee8e1f7dcccf2af7fa82e43f47209/mowes.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/104g5ila3v3jv6c41ql86q8bea/27710723015.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/74539741749.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/funetitedejuja.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/34533735106.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/1llh4kjrve8cfntq40jea926dv/godunireloza.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/6eb5a7bc16026e0e21250292ac647f69/bemesalini.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608be5293c3dd---73681305198.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a409c19bdd2---fuwada.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b8c9745de---tuxowidejutuxevebabasuf.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 11032 bytes
SHA-256: 350fe22161898d69349b962dbac8cfd92f3dacf28596ffe95589024d3b32e341
font_01_sfnt_off00011202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11202 17204 bytes
SHA-256: 7744be819a06b6a08405a5db75f272297447a61afe07a792ff3f4e20d0704ea2
font_02_sfnt_off00013e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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