Malicious PDF — malware analysis report

Static analysis result for SHA-256 8652c088173ddcb5…

MALICIOUS

PDF

70.7 KB Created: 2021-09-25 01:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 57f0f4eccd0fe573eacba47e98683c48 SHA-1: c31d6c4049edd0a15481fa3ed556cc50d71dcdad SHA-256: 8652c088173ddcb5eaa8c60984df69320d86a8dffc685631a1b45204d01641ff
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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 https://pistant.ru/uplcv?utm_term=free+chal+mera+putt+2+full+movie PDF link annotation
    • http://annabarons.com/files/files/gamanipupu.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/97791685004.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/20082937206.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/lowumo.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/gobiwoxavadopiwupuzonor.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210917061748_627547039.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161496f65ad8af---fosamef.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/11509297700.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/48866989937.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/59080866419.pdfIn PDF document text
    • http://realestatespoznan.com/uploads/4905936594.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/basudetovetil.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/87255263757.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/44957851235.pdfIn PDF document text
    • http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/vugokenisovoko.pdfIn PDF document text
    • http://ecole.ru/text/images/file/99518265698.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/wofulatagulurutis.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0beb5a33d---77451020429.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/padofodoferebojoduv.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/26898222965.pdfIn PDF document text
    • http://9275522-travel.com/userfiles/file/losemoguberudereg.pdfIn PDF document text
    • http://electric-kernbichler.at/vifelu.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/61772596435.pdfIn PDF document text
    • https://timminsrenovations.ca/file/Yc3ZuRGjedjwZUsY.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/72010626250.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/6099128485.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/70560064860.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a809e44d7f---22249309893.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_off0000b6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F5 14740 bytes
SHA-256: ff6fad6ad063b94a5deac1be149c6091797ed8e9f02e72eec4290d33060cba77
font_01_sfnt_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 10736 bytes
SHA-256: 396c2a976803adf2d12847fcc39e5e495eec4b62bf37c13a64771aeff1f423c2
font_02_sfnt_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1