Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47e2ab4a78ec5af…

MALICIOUS

PDF

82.1 KB Created: 2021-09-13 11:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 61bb8636b310c28a19aa3f4cc1a8f902 SHA-1: 86e9c7c70315c4a06acfe825b0de47330c5b67d8 SHA-256: a47e2ab4a78ec5af1a5b7951fd76b49a77fa1322db2d640603b44a70d1fbfeb2
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. The embedded JavaScript likely facilitates the redirection to these external sites, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://roshnaai.com/ckfinder/userfiles/files/jodopalegexogiwimumizese.pdf In PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/70159035472.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/rurekodarapoxavug.pdfIn PDF document text
    • http://fitviewer.info/files/file/13221416609.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130041d936d1---vuxevasumeseludefox.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/gikidi.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/27521209031.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebbfc8bc22---mukije.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/pewodogad.pdfIn PDF document text
    • https://fptica.ru/images/file/95779518750.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/38638977784.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/55424864244.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/xerikusonimosawiwugoj.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/jibesodaxin.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/6862450413.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/jogalurexexe.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210903105621.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/7319664274.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/dovisepugisafezupigimawin.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/7747447204.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/vupaganidegegubofoto.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/51125363835.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/zevutukanu.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/pepuvij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=switching+from+android+to+iphone+2021PDF 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_off0000dbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 17192 bytes
SHA-256: 2acd3356988905f9d429fb02e887846b6280c3378f0986ebfd595f687a0d5443
font_02_sfnt_off00012038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12038 11308 bytes
SHA-256: a39da8a5722b663d820275bb5f9a5d143cef2267755537e88330ca1c439d61cb