Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d0d132ce181e43…

MALICIOUS

PDF

78.3 KB Created: 2021-09-11 22:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0ff5a7772b0d6800dd0f0655d96a4b9b SHA-1: b26b6e1efb909f74f632e8d39be9b41de73450cd SHA-256: d1d0d132ce181e43dfe64c94888054cf6b70ea9ad02a45de0360c74db26a70b3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to act as a link farm, likely for phishing or malware distribution. ClamAV detection and ML classification further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=yngwie+rising+force PDF link annotation
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/21079884109.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210907205709.pdfIn PDF document text
    • http://autovoda.ru/upload/files/43166378121.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1a4b614e4---bosevaza.pdfIn PDF document text
    • https://datajournonepal.org/files/sobofoxex.pdfIn PDF document text
    • http://zamgph.com/uploads/file/090638479415.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210909061732_562389841.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/72998128449.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/11251730393.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/12240806567.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/bivipumaweborelipemune.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/93285130312.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cdfe666e72---56463042750.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/17929107054.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/tenebigalatiwege.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/80792059405.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/48772898016.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/43515189333.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/60747413178.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138eaef41e94---sibefezoj.pdfIn PDF document text
    • http://www.idukkidiocese.org/files/js/ckfinder/userfiles/files/putumawozegititoje.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-10/images/files/37508158920.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_off0000ce1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1B 10272 bytes
SHA-256: 3870093ec4039b37e1b3b6c6bd72bc9b1df4761a1463fdb8c3410833f3e7ef54
font_01_sfnt_off0000e562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE562 18140 bytes
SHA-256: 5843edf1dc0221c987e1aa96482e31da68d823b7427a0242b8c5bc3fb8b6fcb3
font_02_sfnt_off000113bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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