Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2ce2fc672d200b…

MALICIOUS

PDF

81.0 KB Created: 2021-09-20 10:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cd2187667cab3a1203f4be7d8232161b SHA-1: 098c31616ae27bc9f55675149d28ca09085ecf95 SHA-256: 3e2ce2fc672d200bdd8310b54bb6bc620bf1b5937e470df3f8822c9854b43b3f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to disposable domains, indicating a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://paperland.bg/uploads/file/jenojusok.pdf In PDF document text
    • http://yasaitogo.com/uploads/files/27554148017.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/23255880650.pdfIn PDF document text
    • https://kingcom.edesign.fr/gr33/web/uploads/assets/file/4122863912.pdfIn PDF document text
    • http://annabarons.lv/files/files/repepipuwalufuredubi.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/jisugorezuzomofikisenar.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/161438c4dbeabd---lirilewudij.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/rureralusur.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/difugegatugebomaf.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/38571324244.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3185d964a---25688056469.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/lupametetotemupususobisub.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/90685466591.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/18238642643.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/70869830155.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/99342198234.pdfIn PDF document text
    • http://gptools.net/userfiles/file/zenoratiwejirapodosi.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/sijerinelurononuweneful.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/vaponipasidepula.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/junosivepemal.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/vujekidazukaxikorunowilu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=get+free+followers+trialPDF 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://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_off0000d8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E2 10228 bytes
SHA-256: 95bab2144dbf5868a56d42cc29b9ad358a25b5bf99958eca006a3b5ab0620b40
font_01_sfnt_off0000f017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF017 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 17952 bytes
SHA-256: 5a61d3f74d4b8502fe90bd9f67f150a10276c332e87181ecd63e062011d414d5

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