Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c7b2fe7c0a1edc…

MALICIOUS

PDF

78.8 KB Created: 2021-09-19 14:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 4917fd02c2e265b8bf197cce5d4714d7 SHA-1: 2fae44ca2fe5512b1fe606ce502e473fb7a80356 SHA-256: e9c7b2fe7c0a1edcb4e1099dc18fa79a21a786b3d44aff778900bbb2309af6b4
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 disposable domains and are flagged as a link farm. 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 0.9949

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://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/014a822eb9a4166f86d810baf4ae2b65/kixofegemulodikeb.pdf In PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/53852399008.pdfIn PDF document text
    • http://cserepakciok.hu/xdata/file/97410334792.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/1bc62de55997cbd4e37ae1ed0373c705/gulisafewofaxe.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/xapob.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/83020315332.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/zalororopikesozomed.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/16213527741.pdfIn PDF document text
    • https://seger.cz/userfiles/file/50722338941.pdfIn PDF document text
    • http://client.diffuse.info/files/dusexunalatamideripajexa.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/56078635342.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/71283041823.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/19318897353.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/josilopibe.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/toxut.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/zisomuki.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/61102042212.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/41299594768.pdfIn PDF document text
    • https://highrise.pl/file/58044869825.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/55429037994.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/manobemegimuwetilavigoz.pdfIn PDF document text
    • http://rayanchem.com/d/files/xaludaxagimimezopeni.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/31981701807.pdfIn PDF document text
    • https://sthouseluxury.com/upload/files/tobajosezu.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/totigukanewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+retrieve+data+from+formatted+phonePDF 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_off0000d2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D5 16376 bytes
SHA-256: 97919d38a6af2e83c37a06dca45f275c1759cabb70c7b088b7b37cda8b2e4e07
font_01_sfnt_off0000fd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11562 10692 bytes
SHA-256: a3cdc2a37bcf41ca70ff4785b033ab0bea5d08f335876c766fa70190723de0d5