Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29b04e182ddfd1f…

MALICIOUS

PDF

76.6 KB Created: 2021-09-03 14:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c6f39801ffc5250ffef7b3f67987c4e7 SHA-1: 1eba57ade4e50ae3a8e75dd1f1b120f43dbe3a22 SHA-256: b29b04e182ddfd1f9d6ad6cb37cd2e9779853642e38f4a97a1fbeb664a04652c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160935a2e2fe78---16300100201.pdf In PDF document text
    • https://readandenjoy.ae/userfiles/files/57476853182.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/sotakemavifovivefizug.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3ac2a6162---babimesawitiri.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42f0199d0---92535501847.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/milomerawizewuw.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/rixitawetuxipogogurabaw.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb3113f980---6637753341.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/losilatexufupawelisuriri.pdfIn PDF document text
    • https://altaspin.com/calisma2/files/uploads/golizagu.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd613485fb---17485868691.pdfIn PDF document text
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/pabon.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/erir2p4m588sso1u7i7td7u0fq/luvodavepuporuzimip.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/27991858230.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84854bdf9b---gaxoxavedamo.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/jowefozar.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/59284020473.pdfIn PDF document text
    • http://camwater.org/media/files/83593279403.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/pokexemixibijunev.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857e29b0710---13397590241.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/k9p3no055akhsteq0g0kiq2hhj/wuxudoruwak.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/46495295267.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/15021768727.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/92841325425.pdfIn PDF document text
    • http://laduses.nl/image/file/funixetutur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=requerimento+seguro+desemprego+sd+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBE 17964 bytes
SHA-256: 2d414d972ee560e2cef193136c6f6ff5d1b1f3e165977324dee926819db21c55
font_02_sfnt_off00010b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B49 10924 bytes
SHA-256: 1e6cb6c976c7e6a974041d9ea986c0b4399c94a6b5382d0ffb16a8a18081d655

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