Malicious PDF — malware analysis report

Static analysis result for SHA-256 532ddda36833f456…

MALICIOUS

PDF

90.1 KB Created: 2021-08-01 12:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 38e4609f6a207b1e683634e8fe49a7ea SHA-1: 76c1d82cb18341efe5b029639d78d8daca1853de SHA-256: 532ddda36833f456d72579f28dee1f314de74a1fd314d9f6433f7ef5f9252a54
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS upload storage or disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 https://truckforceone.com/upload/editor/file/36378369951.pdf In PDF document text
    • http://teusz.pl/UserFiles/file/kabumowikejuratonev.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/54941518603.pdfIn PDF document text
    • http://lobanowscy.pl/userfiles/file/gusumatikesonopilaza.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d2f308cf3---59544822421.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988c1498e0f---36322164344.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/74662784229.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d90e185f273---makowolowonugekitikunidik.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/qcbdof30oig8ctchmbikancehs/77480873610.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/sfgjbv8n7smr2c024ts38thk53/73379208795.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/17259352847.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/mumudonotisimed.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c04a441eb07---jesuraweloxilivamuporomul.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/62573625906.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4360d23f34---pozovefuboruz.pdfIn PDF document text
    • http://1970lions.com/clients/5/57/57eb30a5877ba0c7834658d164206012/File/88260638884.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fb95a7704---bakalagigodoxezonoge.pdfIn PDF document text
    • https://datajournonepal.org/files/gejajupuzojumoziwedule.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/70283474976.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/zulip.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fff9a3bdc8---88445239737.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f344238a5---zojudu.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/luwidad.pdfIn PDF document text
    • http://www.bandungmesin.com/file/jikopaxopezafegopuzetupir.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/5827d09568820bb1d1032a14333c0fea/befanak.pdfIn PDF document text
    • http://mega.kz/media/upload/files/fexakomekibavezifa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=whirlpool+wtw5000dw1+owners+manualPDF 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_off0000f7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 17660 bytes
SHA-256: 99a0ca20c47ff13de2d6ca80bbccc5bd59cf8fb1ffb4e3479995508fdc19ff46
font_01_sfnt_off00012618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2F 11144 bytes
SHA-256: bc249ed7362af5032b80b90dc93c412248e46f8d83d536e61d59ae3666674154

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