Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14200b440a428b0…

MALICIOUS

PDF

81.6 KB Created: 2021-09-02 00:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d5846d90398598a056c00c9f3e10db98 SHA-1: d32d77e117b0f0c3746880029aaf6c8b5080c679 SHA-256: d14200b440a428b06937859cb2edb07f4bdaa09da3d5b2263090f8d0936be40f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised CMS platforms and disposable hosting. The embedded URLs suggest the document's primary purpose is to redirect users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/4c6b0f20b9d2d38221f98f2c92e2a194/xuvadupivavaretagozo.pdf In PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90881f61c---befarupikuneguwomipadani.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/34745788172.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f2f40c06---64187218823.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d167b1d874---warudezib.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/31406878434.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/lowebovajofidilakafoput.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/38960487990.pdfIn PDF document text
    • https://ghnservizi.com/file/xuzefolovatubon.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/6bda30eebf2869658d7e0e23e8674b1d/77691575898.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/91169501005.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e867ca5517e---sorok.pdfIn PDF document text
    • http://kisito.com/userfiles/file/37670338479.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/70734970919.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/bejirarebedu.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/42587467610.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/xujugo.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/dorewejoxawesiwubinamawul.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/gitaseraporubug.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095baee27d33---14683735524.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16077e31914cf8---30011591320.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/petavojovupilulapotakepep.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/63170208816.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/93013471707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=you+are+my+meow+meow+meaningPDF 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_off0000db8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8C 10424 bytes
SHA-256: d2458c4d833556e46f9a8459c2f1d5567ac3c654c14037a18ae635aa25937b2a
font_01_sfnt_off0000f32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B41 17928 bytes
SHA-256: 5626a999b8c6ec54662f521f5c1babe37737b6f11c369beef2d5f4291ce811f6

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