Malicious PDF — malware analysis report

Static analysis result for SHA-256 06de838790c79ecf…

MALICIOUS

PDF

78.1 KB Created: 2021-09-16 14:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 36fcd74f13d4d8bebec270f007c45d56 SHA-1: 999ef26b585e0cb79b1bf42cf2d2ac3781dcf3de SHA-256: 06de838790c79ecf14918412ac157def3791ec477739e9a79569ab5124a3d186
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and a credential harvesting lure. It contains numerous links to external sites, some of which are hosted on compromised CMS platforms or disposable hosting, suggesting a phishing campaign. No scripts were extracted, but the presence of MFA lure heuristics indicates an attempt to steal session tokens or abuse multi-factor authentication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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 http://epplast.com/files/file/7683028157.pdf In PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/vaxixigu.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/wejetidinomekewakexik.pdfIn PDF document text
    • https://digireg.cz/upload/88437626110.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/930fbe52d368341b92148b3741423416/dobux.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613405c18f5e3---lodixikafotoxoxajupirur.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/b90ee894541807b6561825c6abcd7620/xewogaparabapaziserigi.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/logavewufozitawatizimodo.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/52832755898.pdfIn PDF document text
    • https://togelunited4d.com/contents/files/54155078046.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/koretulagukumole.pdfIn PDF document text
    • https://salwangurugram.com/files/60740729257.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/zutamiragezomitup.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/39646906327.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/runeleg.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/gibarexokorigaliru.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/1925588148.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/misuwupusi.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/62174665600.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/bunugukuxero.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/gadugisakavidipanu.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/2602791747.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161416f39cc299---jazevulelaxobowuwumef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=does+apple+have+better+security+than+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_off0000cc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6B 11032 bytes
SHA-256: 941605f274f7f331f3936d94e79c751e7e4ff8125c393438c5854b09350ffe10
font_01_sfnt_off0000e5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D4 17120 bytes
SHA-256: e99084fe171cde63868727cf5acd8da668648a3cb9b95d020a243aa0d50dd52e
font_02_sfnt_off0001121c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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