Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced262cfa26a37a8…

MALICIOUS

PDF

78.7 KB Created: 2021-09-19 02:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f3dbf417e68126abf0de78be48a781cf SHA-1: f2ea38ba6af536e343c071750dad49c4cdf75179 SHA-256: ced262cfa26a37a8b641c542a12cbbd67343473eb3721b24441c21ea528e023d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to external websites, many of which host other PDF files. This structure suggests a link farm designed to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • 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.
  • 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://garglob.ru/uplcv?utm_term=memoji+download+apk PDF link annotation
    • http://gucaoyun.com/uploads/file/10215619393.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/62439635132.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/44176754040.pdfIn PDF document text
    • http://bud-med.eu/userfiles/file/33566583159.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/gobigutevewaw.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/ginetomam.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/lofobevodelexinozoz.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/46029789539.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/xuxebogefopi.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/sinasebejudiriwiwuki.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/20321776064.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/86678122506.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/7120684424.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210917_033452.pdfIn PDF document text
    • https://karjerastests.bankai.lv/ckfinder/userfiles/files/xotekewikepobetozofaz.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/xalexubakonokavoj.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/9d87d55f76cb2d1254e8da3449a35186/39045774497.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/64804035947.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/vukarefotulunudedapedojuv.pdfIn PDF document text
    • https://badoza.net/userfiles/file/pomaverovemivokaxanibi.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613284498467d---felulumatufevuzuvef.pdfIn PDF document text
    • https://freeunlock.com/uploads/file/633443655.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_off0000cfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB2 10488 bytes
SHA-256: 6ceea8f3c89391e94b9cea057eb84f1beaea36ca3cb9a38dc5aa50b88d4c3788
font_01_sfnt_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 18056 bytes
SHA-256: 3a8e570777e2038c91ab512692a29b7292deafee47f1642e75ce8528d42c5f5d

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