Malicious PDF — malware analysis report

Static analysis result for SHA-256 60189e4a6cfe6cd9…

MALICIOUS

PDF

75.9 KB Created: 2021-09-18 06:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 89de1a97698f214eb9a3c49d3b7c1906 SHA-1: 506bc2c26bcae67a8bfaedeedb674632077a9d48 SHA-256: 60189e4a6cfe6cd944e604c7ef10f204360548da296d77caee317ca9d1580d16
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs that point to various domains, many of which appear to be disposable or compromised hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the document as a link farm designed to distribute traffic across multiple sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=listview+in+android+with+example PDF link annotation
    • http://ttccid.com/userfiles/files/20878158604.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/81354136367.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132ffe8ec81f---rowewimamolupagizevun.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7b2d5a0d1ed16fb1b2d4e094c4f2253a/29389201251.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/43089303070.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/winupuguba.pdfIn PDF document text
    • http://www.heksan.com.pl/file/69473250409.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/30542813179.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/guxareloxonuvomeba.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/xazejarofafijeref.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/vepuvu.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/36134253166.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-11/20210911013106882975.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/52419726887.pdfIn PDF document text
    • http://hzdsbg.cn/uploadfile/1630777849.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16143fcdedfa4e---43387613463.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/tidikaduzilixotabi.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/u2c18i7mjveptp9m0qroqcif19/mifelupiponewepusesata.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/60798038926.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/57012439227.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/4930038245.pdfIn PDF document text
    • https://hiroyoung.com/data/files/dipibekeda.pdfIn PDF document text
    • https://www.alliance-educationsexuelle.ch/ck/ckfinder/userfiles/files/dozatupupezumapa.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/vofilod.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_off0000bc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC93 10868 bytes
SHA-256: e1f5b5b3d17936302f78c1b28f9dcb292984d2e5f5db17ae37c441e4b6325447
font_01_sfnt_off0000d58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 19828 bytes
SHA-256: 2a348e423288f953bd250efb36bb27cae94b4215b5efc34cc3c4ba8ff39853f9

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