Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdaa836d1934a79…

MALICIOUS

PDF

101.3 KB Created: 2021-09-11 16:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4d40220d92bf5c126cf846731a4a313c SHA-1: 3b67ea502ff54267965e7721c55aacf5611a0808 SHA-256: 0cdaa836d1934a799ba666b978f720e890909ffa3dadf180f56a97be92f3c437
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple URLs, with a high-confidence ML classifier flagging it as malicious. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into changing payment details. The embedded JavaScript likely facilitates the redirection to one of the numerous external URLs found in the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://questyme.com/userfiles/file/wumope.pdf In PDF document text
    • https://verredistri.fr/xmedia/file/dafigi.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/wixaxofumijev.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/farazujazafeji.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/wipuwonujijedomat.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/piribojidejunopiza.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/94435322229.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/54890953556.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/rifodeb.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/pideveka.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/88721726373.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/98897628393.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/30791210211.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/getixulorowegigutalugojob.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/mikemonu.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/wowadifagibobaxoberulozob.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/3176058587.pdfIn PDF document text
    • http://cortabellanews.com/userimages/16656597292.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/0l46gv8p4gupjmhrp0feb4d8f0/85900708944.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/lovuti.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210906045257.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/sagiru.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f76fb80ad6---daxizosiw.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/58745060079.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/98101888323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=acsm+ebook+androidPDF 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_off00012380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12380 20076 bytes
SHA-256: 79cbc54fca290cb8ed96990c87fa045dc7f070b191bbd3359c381c984368b6e8
font_01_sfnt_off0001577a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1577A 10600 bytes
SHA-256: f40d1b721e084dab388380da4cfa5e4fc5499cff1c7fbe1f7625992fc131d733
font_02_sfnt_off00016fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1