Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b14202d42f43c1…

MALICIOUS

PDF

84.9 KB Created: 2021-10-17 00:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 294a9976dfa13ef49fa670f845abfde0 SHA-1: 948ad0a71a5d17f68f50ab6051fe83913d546709 SHA-256: 34b14202d42f43c18ab2939357f102b1832e8213eb3b25b8464bb687e1536902
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggests the document is part of a link farm, likely for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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 http://allasclub.com/campannas/file/dolegisavugonapop.pdf In PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/13325998174.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/36769982698.pdfIn PDF document text
    • https://parkerboat.hu/js/ckfinder/userfiles/files/33587895932.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/lopew.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/safejukabufiripiguw.pdfIn PDF document text
    • http://e-hematologica.com/users/file/9956242165.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/ruvesevukarubaxo.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/42166567317.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/44784791596.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/pasulunaroresaluloreregef.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/94591210581.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/98294125061.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/21919233001.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/kupugivodazivefevejabi.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/83690992087.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/vakaruxuzajiwerufe.pdfIn PDF document text
    • http://www.somdattabasu.com/fckimages/file/93089306438.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/76725129838.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/livulupuxerifele.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/62747398142.pdfIn PDF document text
    • http://9275522-travel.com/userfiles/file/biluboradalomonusariji.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614af107f317c---27561430534.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/7xhmvLXWVJc/uplcv?utm_term=used+dg+set+for+salePDF 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_off0000e853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE853 17792 bytes
SHA-256: 7bb57567ebdde246118c33f838c7c19054e18f4e53cfa2dfe6ec1e6aa2a65153
font_01_sfnt_off00011699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11699 10340 bytes
SHA-256: ebfa62352bca08d08cc5f86fa57228c8e7e0a277e9f95d6f98f0358931e2aba9
font_02_sfnt_off00012de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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