Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e6625803938ee9…

MALICIOUS

PDF

80.4 KB Created: 2021-09-16 01:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f4f104f52b2791e697996a9476e89ab0 SHA-1: 9f8958a5f7d7d4373e27b4a22cb0d1c1698a2c39 SHA-256: 67e6625803938ee93ddd81cb5c77df57cfb16a4c95f3ec8112c57de66e996459
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URLs, many hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript, though not fully analyzed due to obfuscation, is a common vector for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=download+radio+apk PDF link annotation
    • http://czpohledavky.cz/userfiles/files/xajetirinofotufofabalos.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/sovizinus.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/e13b2448050aa528f9a98f8feb6f5bb0/vemomuj.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/repalabobitafewiwilut.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/nibojimesubar.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/dakaxajenavenumuk.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/65340543699.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/4425712083.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/0f4b4091a059b3411b8abf4168f737f9/fufonoxafojizodif.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/lamisetipesujo.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/vupewuwe.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/32779090972.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/nomotuligatazazabosib.pdfIn PDF document text
    • http://tornyanggrace.com/upload/file/limofuxavozibe.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/belix.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/46968991444.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/14161648570.pdfIn PDF document text
    • http://rongqichem.com/upload/files/pitifesil.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161330f8569504---welokiwabewizikesolovuteb.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/20121047726.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/musifobaposopegerep.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16137f066586bb---62294667254.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/42408308892.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/70292213129.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/93145100800.pdfIn PDF document text
    • https://clove7.com/userfiles/file/75420903248.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_off0000d733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD733 10164 bytes
SHA-256: 2612e5bcb7b51e05a508d51b1dafee6e7aefe0c57905832714ed91e477530a88
font_01_sfnt_off0000edfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 17968 bytes
SHA-256: c4570331a66ca835b7f774c82090d286aa1fb553a0a182acde2210d9a5b2b4bd
font_02_sfnt_off00011c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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