Malicious PDF — malware analysis report

Static analysis result for SHA-256 4391855e0ed4ef65…

MALICIOUS

PDF

76.7 KB Created: 2021-09-18 03:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ccbe3ebe65546d64b6b40969e78f04b8 SHA-1: 80203bcc19adb033b039f05f295b65538d2c6770 SHA-256: 4391855e0ed4ef65de5aa3d1f58932454abdefa18ade6914d22c2dec6a419d6d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a Google feedproxy URL with 'football manager 2020 apk' in the query parameters indicates a potential lure for game-related phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16137b6caaf682---45348720554.pdf In PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/9bbde8cd3c21e7ec23219fc775275fea/68351537244.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/246211113.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/dirijokija.pdfIn PDF document text
    • http://maxbrio.kr/files/files/2108664438.pdfIn PDF document text
    • https://tarsiman.ee/files/file/dadamomigolu.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/87207106260.pdfIn PDF document text
    • http://amrapalispot.com/userfiles/file/zakesowite.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/daxiluxaninofiwesivazok.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/tesuxirigemuwebiratetafu.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210906203114.pdfIn PDF document text
    • https://majubesar.org/contents/files/xoxorabobizosedekideze.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/43966364637.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/tupipazatemisedevom.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202109090716382034.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/55278152978.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/30443570783.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/90816927640.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/38919035822.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/2426027776.pdfIn PDF document text
    • http://melvin.cz/data/74129556587.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/15321246201.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/5435606591.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210912_E7552E8D920EE68A.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=football+manager+2020+apkPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/62306074934.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_off0000c919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC919 16804 bytes
SHA-256: 993b36c416a7001ffe3bff6fdaa0d00d6f4e32eb218ee40b2908b25f0875a637
font_01_sfnt_off0000f43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C53 10784 bytes
SHA-256: a93c8c04dd76e02e690f57bd9a77b601ef148d94179340eff9fa7142485e5f40