Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7206847e15aeee…

MALICIOUS

PDF

80.4 KB Created: 2021-09-24 07:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb4756e2d0b89683a5e906b9ea75199e SHA-1: 51162928b2c93d92156894f3672394a1d86c9f03 SHA-256: ea7206847e15aeeebd45d81e23ee45344035d8f50377d0656b2dcad7b22c0b0b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it's designed to redirect users to malicious websites. The 'Fake invoice / payment lure' heuristic strongly suggests a phishing or credential harvesting attempt. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://huntic.ru/uplcv?utm_term=volca+sample+android PDF link annotation
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/lanowipusemoxekovogi.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/gexunabifolinezuzam.pdfIn PDF document text
    • http://didula.ru/img/file/23194901348.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/33999159789.pdfIn PDF document text
    • https://bfull.ru/uploads/files/48585898227.pdfIn PDF document text
    • http://zoop-tech.com/ckfinder/userfiles/files/70600958536.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/32007168879.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/lizidemaj.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/b8c22ef346322d4e9c27571786815aef.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/d9jka7ecj1u2qnnqtl33f2rphj/19485984611.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57021658471.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/sibojisa.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/degipuxunuzo.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/72380440738.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109070302246755.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/6597090692.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/nubewozeluxumukuvitub.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/76668446337.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/winuxafoserot.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/xitatovifojunit.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/xabajijineb.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/49557033592.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://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_off0000d7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 18460 bytes
SHA-256: 6a640e86c5ef3c870c200048652dff99c7703df26eeded10690ff06698d037cb
font_01_sfnt_off0001081e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12035 10544 bytes
SHA-256: 64405ac5e58c03305eb98584a3de98b18c1ec4a53b1413779884eb9be67f5be5

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