Malicious PDF — malware analysis report

Static analysis result for SHA-256 5614de4bee0be385…

MALICIOUS

PDF

76.8 KB Created: 2021-06-20 08:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4ee0d4ecce32099a6a72bafb57178973 SHA-1: 6ae1d084e9eef16ccddd7e5384eeaee6c7acad43 SHA-256: 5614de4bee0be3850adbd7d48a12fcd68abc8e33f3c37eb429c2db44a03fb0ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external sites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs indicates a potential SEO poisoning or phishing campaign aimed at tricking users searching for specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=sarkar+tamil+movie+torrentz2+download PDF link annotation
    • https://accesoriosalmayor.com/images/userfiles/file/wojufiworotofabulinojor.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/24691981080.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/6167a7f7438d761d1ac71f1990e72152/vufawibedaletode.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b753e5c35f---75750884271.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/filul.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/lowidajojazeji.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/segipaselutukinosonibefa.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/424e390fb1f77f7a494e4525c26fa3ee/56967404755.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ab996d77141084dc4f0341f20690667d/71406653254.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd2249c337---rivowibunoxozajulonex.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6d9449104---85158565754.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d35190a93---dululupunoxewoboz.pdfIn PDF document text
    • http://mutitar.com/user_img/files/tafubejafevogizej.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/24beda965a5f8d621eac91938eb78bce/42249229907.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/491552e60fcef1f7bf506888785703d0/rabetewanoxuwerulum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 5296 bytes
SHA-256: e0204eed40ee6e4ca1b689031c0353d11585b04fd32f2d3ef2c12cf41fc74d31
font_01_sfnt_off0001024a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024A 10648 bytes
SHA-256: cd72b4d06dca4f58c7e4aa1f2688d08f50fea9cfb257f326a24574aabb1daa70