Malicious PDF — malware analysis report

Static analysis result for SHA-256 67cc0271569295e9…

MALICIOUS

PDF

85.0 KB Created: 2021-09-02 00:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4f7ed543bedd72fcf1bb240b38b3b861 SHA-1: bfe1d3473ef38967565c2b254ccd0a3fd9334553 SHA-256: 67cc0271569295e978e6c8da828d61f10ecaa2dcab92274571bd4ab9be069f17
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded JavaScript stream and numerous external URIs pointing to compromised WordPress sites and other disposable hosting suggest a phishing or malware distribution scheme. The primary attack vector is likely spearphishing attachment, with the PDF acting as a lure to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.pranabkumar.com/fckimages/file/38582878932.pdf In PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4d0248c4f29daef2e297dfbd29ad6c17/48616617366.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/346c26936dd1f20a18d3272f87ba8c4a/34200845660.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/16101295133.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ecbf039974fc20212068487ffbd06847/18940534866.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/wetarokubowivugofabidura.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/65c217335d46069735d8fb0b3beeb4df/47755927146.pdfIn PDF document text
    • http://eternoohydro.com/d/files/bizezirowuwa.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e331bfc33f8e7c6061fcff07baef1f7/81105170028.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160afd8a01a788---rananotasawirutevokogik.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/57488422172.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/65772567808.pdfIn PDF document text
    • http://24cvety.ru/upload/files/22931075651.pdfIn PDF document text
    • http://warungmimpishio.com/contents/files/79725984102.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/jezenalokonumego.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/46944606071.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210705_6A8AD58FD89FB37A.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/52861179764.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16113cb770e082---viwebowetigebufudozo.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0d518837f---duvakeserexaz.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a416fd1722f---salamugemilofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=minecraft+non+laggy+shadersPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e336ee0da4dea692e7b3c03d885e1beb/15478388642.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 19716 bytes
SHA-256: e51d49113d813db439b61d22ce6dc70b97df02ecffaccf3ee170b4040bd84986
font_02_sfnt_off00012d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D24 10864 bytes
SHA-256: e8ba446c039275d7b7cb8729d8406b664dec6415b8a595098c0c8f16869612ee

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