Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ece295bc0b114f7…

MALICIOUS

PDF

84.9 KB Created: 2021-08-03 08:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a3d21f502961e094b6b464fd1a27acf3 SHA-1: 0b847a4be0cb1a6c1583ef537f1e59c06b5ebd56 SHA-256: 7ece295bc0b114f72488f3d37ca070db5d5e5415970555890d9f87e70496c73a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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 https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae4f982268---kesemanagesebunogapa.pdf In PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b600fbe1688---24807008394.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/zafeba.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/kurevakuwijalenikijixofo.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a66d2901---73098987310.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/ravuxoforasajegozamoviz.pdfIn PDF document text
    • http://usateatop.com/_upload/files/42444544941.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/watefugidoboselobifeju.pdfIn PDF document text
    • http://classofjoy.com/KK/userfiles/files/dozerizedifevenawikenoju.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/a7fc7fc02af62fc463568a1200694626/18581140841.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/5ee828d48ac0b43252f6180cb7af0ce8/57749948551.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/3238829341.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/gjo5ac5jsa5appmjresshal0vi/lafixutin.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/kadedu.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/ravazidaxuxedemegoro.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/mekavokexivijixekobes.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160709238efe22---84693762173.pdfIn PDF document text
    • http://dnepropress.net/files/file/dabetikepanijabob.pdfIn PDF document text
    • https://fishboat.hr/files/53554386069.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/wowotadalopupibirutugir.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/49868771437.pdfIn PDF document text
    • http://yongqingtech.com/d/files/mosozufujevadiruwina.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d795f8457b1---xukokivodikisob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=libro+para+colorear+de+anatomia+pdfPDF 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_off0000cf3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74D 17924 bytes
SHA-256: 195770d5d57acb9b8607e926e0e50147b7eafb5338c14a8b986a18ffb12412c7
font_02_sfnt_off000114ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CA 10708 bytes
SHA-256: ed9ae27b5fe3f7ce89b964c77eeb972aff62129e34e3f2ec6c6a35c4cc576f20
font_03_sfnt_off00012d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0F 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b

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