Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee68ef94da3a60d…

MALICIOUS

PDF

92.5 KB Created: 2021-07-13 13:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 26bfee94597716a4c5f8be49fc82b28d SHA-1: 3a935a9a6f36fd488d458519a5f71d9bb192a544 SHA-256: 5ee68ef94da3a60de5ea5bc45dc990b0c3318859f1de19eb89c892a0129496be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://irlanc.ru/uplcv?utm_term=urban+sketching+the+complete+guide+to+techniques+pdf PDF link annotation
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/85458018467.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/nukevobagebefekesatem.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/187c06ca3081b9f9fa725d3d62ffb5df/36960748663.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2213993737---wevinutoviverewonemasa.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607398cf40f25---ruxiditojatumekazobu.pdfIn PDF document text
    • https://actorconseil.com/files/file/98278728307.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e16f37a8a4---nudolimawuboridelumitoxe.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/zexuwutidibufovokufuxiz.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/4b06b4757dfcf91211ea70a7d4d8bb17/liwizapeguremaje.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5e730905b---ziwefujepil.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941c7f537d1---zarunevano.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/f2194ad2ee7735d895592503a891e4e3/vatipa.pdfIn PDF document text
    • http://focostrade.com/files/20210624214623.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae8d86faaa---91544854741.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799efb0f5d8---53325044363.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/80205726185.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/samipibiluzovotobedal.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/8bd712f79afeabba17ec397e5843fc4a/kameke.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/2e3e46d318a9a342cf33e09e5fbd5058/73937680396.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/04/file/20210604_095348_198.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/pifiv.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/fespc6qcialfoii142e0tajioo/55202942738.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0816dc437---88892333543.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_off0001044e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C60 16984 bytes
SHA-256: 337641c3395f5d2238a88e1229a9b39b27149d51ab3600cd5c0f40054710c053
font_02_sfnt_off0001482b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1482B 11552 bytes
SHA-256: 00d082cde7eb1b8cf84977ecf5f2667c1591d7130ae970aa4bfad47175317041

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