Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e534a668fe2c26…

MALICIOUS

PDF

72.6 KB Created: 2021-06-24 07:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 614b19113fef7a80ab6f7d273ea2c078 SHA-1: 2ec358e58337edca328ff18ac2409c4d239954a1 SHA-256: 60e534a668fe2c2672e1a6dcff1ee644a8d33b114ac4ce82f85794239b883c4d
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document contains numerous links, many hosted on compromised WordPress sites, designed to lead users to download further malicious PDFs. The presence of embedded URLs and the nature of the heuristics suggest an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://brothers-music.com/ckfinder/userfiles/files/50964823914.pdf In PDF document text
    • http://digemnd.com/UserFiles/file/woxitemonokoruripeluloli.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f93500f5d8---28517692857.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b82f60fa71---48670442398.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/gafubesuri.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/b86fd70c27060d06c90c3742fe82097e/49918818381.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/69f8aa4679125e34a5a29dc64d90a88b/rowoxi.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd48407097---73045926488.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/188b9210ab009f08bbe8a88da176a1cd/48134949417.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/85728604777.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a317c07cfc8---tiregixumakolaro.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/mamirufafivogaremafufajog.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/miduvujeronevodel.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/bijobigamulasezobufu.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/dadccb20dfba7db68a630c43a8667d16/39452639780.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/3uhmdrukcmitevii8b7ci2gkl0/pufabuviwanarefureso.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/vc5ip596k8n7nat69uijo99k9d/43938020203.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/3d56b6989720153011d57549f848f3a1/pumogejavagabafedazowaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ap+icet+model+papers+pdf+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 5384 bytes
SHA-256: 30810476ca831de2521fb740c453b107c696b1ab1a547277a32e2d1b89e002bf
font_01_sfnt_off0000f077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF077 10760 bytes
SHA-256: 92b09db57bc2149ced65d581678cad309463e97a0c2295cf5f0ca5053c308f65