Malicious PDF — malware analysis report

Static analysis result for SHA-256 afda48f15732dfe8…

MALICIOUS

PDF

74.7 KB Created: 2021-09-18 22:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5a5f879db0eeae4651a973e46562744b SHA-1: 78f95fb0fe6afd6e1e4f381ec6d8ab91a673e4c5 SHA-256: afda48f15732dfe8124406699f8f31c311565e81f69df5fc22a42970004bc001
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially malicious or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure the true destination by using many distinct hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://globalmediaminds.com/uploads/files/72619895729.pdf In PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/mazufuzu.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/66485963999.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/josuvedokepubobasekasudi.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/3627448652.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/79e5ef38b8bfb6249d7ac0b3823384e5/22340889160.pdfIn PDF document text
    • http://capri.lt/userfiles/files/rukesizikifir.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/vokerapozuzubaluv.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/xapetuxatinafodovodopem.pdfIn PDF document text
    • http://rrarental.org/upload/file/sebalub.pdfIn PDF document text
    • https://laser123.com/geektic/files/27196349089.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/63588153377.pdfIn PDF document text
    • http://njxinbell.com/upload/files/68630288278.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/toxubifelomolajij.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/pefuregizokix.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/35098450221.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210917_E824F3A2B279529B.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109070715036727.pdfIn PDF document text
    • http://elma1.ru/!upload/files/vebuzesagapadusamemu.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/donenaxebo.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/9bc28b90c86590a512b94c89bd11f99c/letetozelemerafosuje.pdfIn PDF document text
    • http://xycrusher.com/d/files/gedawivozupobuwokokes.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/labulumavi.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/pezurinejopobelupiviluni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=android+version+of+testflightPDF 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_off0000c218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC218 16608 bytes
SHA-256: 4624c8e6591bb4f123bead83e7c394aa774a5e12a416fc61d4fb8166c2448f74
font_01_sfnt_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E7 10520 bytes
SHA-256: 1fcab141b734108032ccc5e4e0492f609e3b627f16664b1cc8a5b6786f63bbf8

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