Malicious PDF — malware analysis report

Static analysis result for SHA-256 68aeee8f5b6f7d4e…

MALICIOUS

PDF

83.2 KB Created: 2021-07-09 05:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 70519ff30fb04309214c648c0aaac033 SHA-1: 3da282160fd655cf0dfbd7af50d259055bf762ba SHA-256: 68aeee8f5b6f7d4e8ae28e7980b4b48740086ac2d70e4b703ce206a2e03c4afc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/dofovisikupozi.pdf In PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/2e04cd3c4f81a585d91372d8bc2ca22b/pazotifukewob.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/patov.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/72961075898.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c73d147e53---kixevisogavoxulusupuwu.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/fcr79bgopht481orb3qv0j9vpb/60465650740.pdfIn PDF document text
    • https://gazelletr.com/userfiles/files/mitategivibimukinuveniwe.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/fujol.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/ce4d6f625df624167f6d494e0801749a/timadajudifewezuvujeza.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160badd9c1e0b0---6828025572.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/me41c0dd5a2q3fmbd2eumo2u17/90181765280.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/fuguzu.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/17082955098.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/34075177188.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/alexoreziluxo.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/dogccnb606ns6ogn8pb25g09pa/namebofasiborugejubef.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/ei7h52an2kuulk57ep1m7899f2/35088865488.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/765d36da23760f302b2d25b69a21b498/bitarigawobafewadulip.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d46a7ed70c63bff197d08c087a4bfc53/fikinibevoxida.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/61010249329.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c8eca5bb2a595740f6ed618383360658/garadunapize.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160810693312ba---pusudebafugujek.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/30552629580.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/7061152064.pdfIn PDF document text
    • http://atek-ent.com/upload/file/tikomuxepigagi.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/1e0b560f966e80042eac5cae06f486ee/79684613326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=time+to+say+goodbye+piano+sheet+music+pdfPDF link annotation
    • https://mediaget.com/userfiles/files/97365239500.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_off0000dfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 17484 bytes
SHA-256: 55ba9a543c16f53494684ec0ee084fbbcb7797d1fb9ac06217770856aceadf45
font_01_sfnt_off00010e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12626 11240 bytes
SHA-256: 93e1305e994173559b0d47c1d3cfe11768e503b4c60671241b517f17edb09664