Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4394de0266f627c…

MALICIOUS

PDF

86.1 KB Created: 2021-09-19 19:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 00fa4cf2ac54436a152858d27bbc3edb SHA-1: 6655fb5d456046cc15e73c390d49fdefd8f0a787 SHA-256: e4394de0266f627c5c9d87a744761cd795712298fb2f5b30050dd9958ec504bc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=mostofa+game+for+android PDF link annotation
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/gelavedebosixusatogipav.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/ralowigatimati.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/99693987138.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/75543316416.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/rosugojumasekerurizo.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/76805259635.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210919143640_625598797.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/bijifibeduviluzez.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/sipuzo.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/wegone.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/wubabunazivasasukego.pdfIn PDF document text
    • http://boki.hu/editor_up/viwupiviwelu.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/lesaregov.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/69289656393.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/semosikabosepunodakudiz.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/4810464412.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210915_162630.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/33159348874.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c0cd8a1f4d4e0a23429572bcc726e202/4827654784.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1630523877.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/72674041966.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/12522401115.pdfIn PDF document text
    • http://dialogueinpraxis.net/files/docs/30642567026.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_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 17060 bytes
SHA-256: 840981705514981abc3f231856031ec56c93ce9ce17231da032cb0dd13dc0576
font_01_sfnt_off00011a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A40 10644 bytes
SHA-256: 60c4eeb2803ffa064ab8d5fa267c6847b580e91be2e7dccf9c1d4c0bc39c36cb
font_02_sfnt_off0001326c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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