Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a68e35295152619…

MALICIOUS

PDF

92.7 KB Created: 2021-09-17 05:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6c78dbf7ec3fc276dcb8cf4b1776d099 SHA-1: 49b67c2c0c563807ce1c7a77ab40039198ba6eba SHA-256: 7a68e3529515261965150cf58a719d88c8dfad1dfc5edb0771ba8401543f4431
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The ClamAV detection and ML classifier strongly suggest this is a phishing or malware distribution document. The presence of JavaScript points to T1059.007, and the nature of the document as a potential attachment suggests T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://huntic.ru/uplcv?utm_term=pokemon+go+pc+spoofing PDF link annotation
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/lugunexesujawaza.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/rifitosefubegiwonorafiba.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/74713794268.pdfIn PDF document text
    • https://sitarasign.ir/data/file/xisegun.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/vagenupalog.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/gofijexapegukul.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/wafuponolujanijadi.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/sekixe.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/xisasexuvokesuja.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/gexiper.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/tikafofasejefakujubu.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385d5cc5be8---56796357356.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/dujomosomukemalidepunaki.pdfIn PDF document text
    • http://inistor.com/ufiles/files/96876354744.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/39109649321.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/88450536417.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/42793580707.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/38646808359.pdfIn PDF document text
    • http://trubaopt.ru/content/file/badetisupaturepuxi.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161430c16769c2---61803718894.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/59639831663.pdfIn PDF document text
    • http://maihome.hu/admin1/file/gezikolineziwapur.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/67423621586.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/kukubirovem.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_off000104d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D6 18488 bytes
SHA-256: f91feaf22d71f59f4a1742a627be99ddea1722d53be70ca3722b0776d84d83c5
font_01_sfnt_off000134f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D09 10512 bytes
SHA-256: e9217f5af72b295fdcc06f703bd9550f02680bba5d8cf3dc36992bde36cda922

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