Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e7ce8b09ee086a…

MALICIOUS

PDF

81.9 KB Created: 2021-09-08 16:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 056e622c6cdcefe843862eb856059dd9 SHA-1: 6a177447108e5d15bc61675613c338ab8c34ab32 SHA-256: e6e7ce8b09ee086a7f508e4630fba5daed37dd7ba03718c570af77e6c658f2c2
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it's a link farm on disposable hosting and uses payment redirection lures, suggesting a financial scam. Although no scripts were extracted, the overall structure and URL distribution strongly suggest a phishing attempt designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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://crysiq.ru/uplcv?utm_term=download+aadhaar+card+online+pdf PDF link annotation
    • http://aygroupmuh.com/image/files/83345624473.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/1644328372.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/55671074619.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/49406995235.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/kafowobozuwopovilajemoxu.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/wujanufawadafuxotivarexa.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/33998453614.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/rewazujomuxenariforo.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/woxubi.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5b8b900f62fdb7bc0c9e8752192ad53d/32883918893.pdfIn PDF document text
    • https://31app.com/userfiles/file/65093546976.pdfIn PDF document text
    • https://artbynela.com/uploads/file/59665773939.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/84070906326.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/belanisamavutukogotalisik.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/kopifadusewu.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/335640180.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/58375566464.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/vazuvitovutezejipexixol.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/3df5837746eeeed3257854ee268b8ce8/kepabapurafabipipufam.pdfIn PDF document text
    • https://aedwea.com/upload/foto/mobigikagurikegagazoruba.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/15682185105.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/23312118355.pdfIn PDF document text
    • http://tataservice.it/userfiles/file/29851816880.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/23503819290.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_off0000daf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30F 10540 bytes
SHA-256: 4dccac2cc97396591dbb32dffa1c8788e00fda5c26dcf418760139f676087adc
font_02_sfnt_off00010af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF8 17972 bytes
SHA-256: 3a1394fbb0304d93307a7d7ce2fd15f6c1d9e5f77a83fb317a6c8fabf55d329d