Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02bba8cf1bd681a…

MALICIOUS

PDF

96.2 KB Created: 2021-07-02 06:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: be54dab12335ee36a37e02744151ce3d SHA-1: c3945a9853569879a10c4c53433cafad361bdfa1 SHA-256: a02bba8cf1bd681a2abbaadbd66ad4e194d5c46f3f6158cf2784af46deddae6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/23b0f067d0f7a0151a903a1dcc4b55e5/dilanidudivesi.pdf In PDF document text
    • http://fairway.cc/images/blog//file/wexebebodavosifitak.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/zulipuniter.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607658f0b28bc---pepijaxonanezaxabefugev.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/47156174201.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4b2cb7718---3995854300.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65cba2809a---61109330107.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/758fcc97d3dd85c9d4df48c91c50f065/50787563507.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/65935271622.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/12543249670.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/7347afb59889852a8eebd8cf881511cb/pemabejovamuduworotamin.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/61324648626.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e750de0f9---bijubi.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba787861624---livimikitafixumez.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/e60f8e6e07961dc33eeb87d01784ece1/56199799069.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/watazudafimetepifabomawo.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/105d471247a92f72cc88cdb5fc425186/81967686185.pdfIn PDF document text
    • https://afayl.com/userfiles/file/2037382665.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/medumiruraxulufus.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce9620e801---29868422306.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/11bec8112a63edb4fbdcd914860d1009/zozalipifetudexidetukuxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=main+stages+of+effective+presentation+arePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 17228 bytes
SHA-256: a69ed9ceea632c7a1accc439dc3c1baa85d28946c36ee1c65309c85a7cbffbfd
font_01_sfnt_off000126e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF1 17856 bytes
SHA-256: 97257ef85ca6518690aebfc53273ff4001a70c6233293dd85583ecb91c314d11
font_03_sfnt_off00015a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A51 10668 bytes
SHA-256: ff6ce4dc1b19edd4df507e67a5d24c282b5dea183a133495d852318901494f3e

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