Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e1d92f4249eed6…

MALICIOUS

PDF

83.9 KB Created: 2021-06-27 20:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d63f4572d2c19bb3652e59d2aec9d220 SHA-1: f3e194fba436394ba4987772066bb8b20dc0b81e SHA-256: 33e1d92f4249eed6aa200aa8c9d70a6ef94b22ad0cbc2a815ae6dac7ae81b188
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and unreadable, but the heuristic findings point to a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/6d969qr8u84a0iuj8hv432ef2d/remisoviwapiros.pdf In PDF document text
    • http://agcslohian.com/userfiles/file/lesiwiwor.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/hpbr1e1cvllvafq27mpkdu6eth/xomiligegotane.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/nqoon8keimbp6n8ofuc7mcc654/simijegababerenerotuzenop.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/jbuniqbn6bi73la0bhpdmke301/faxilelixosojagobozuruz.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070f96981cfe---vaxiw.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608670faec164---35807381369.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/lakubumalukave.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/6762423941.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/pomef.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/66e09aa415d4633483ee43d9a3126fb2/vivibuligerelewedexoji.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e51d25455---7865972318.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/40017196739.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/31148935351.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/bbd0869eaab7a05e86edf195ff7ef42c/geloxuguzazufab.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d929ec8a5---9180661390.pdfIn PDF document text
    • https://dafelia.com/files/zufuzeba.pdfIn PDF document text
    • http://fygl.net/uploads/file/191745301305.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/102925673ee395e74babdecb3423f66a/kugalesagufejebovawebix.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/777k2qanvh1kani4sf3dl43i6s/41254731383.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607942d3490a7---zanafulos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+transfer+photos+from+iphone+to+external+hard+drive+on+pcPDF 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_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 16808 bytes
SHA-256: d67620f052aacc0e7f5227ec79138dcd8c27df08b9195b76a965e5de74e301f1
font_01_sfnt_off00010ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001280b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280B 11128 bytes
SHA-256: b35fb94a6462e53ad23f1f7e212a0e6e669c4a284f942d57e861e792c8ea819e

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