Malicious PDF — malware analysis report

Static analysis result for SHA-256 324fe9c6969ed31f…

MALICIOUS

PDF

79.9 KB Created: 2021-09-17 02:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 06725806e8489f44d67ef5758ddf8479 SHA-1: 343250c5ca253bc73709bb2ab5813243fc610d87 SHA-256: 324fe9c6969ed31f6d1d7200cb9ec5c6bd7d69b7ee946c6d2e41e9ae59810da1
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs, many pointing to potentially compromised WordPress sites, suggesting an attempt to redirect users to malicious content or downloads. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/bd42bed4a470dd3fe6af4512d148e222/soref.pdf In PDF document text
    • http://3asoft.vn/img/files/36297648850.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/32647de7c643ce4b5a6b20427e811e28/39818230774.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/xiwololokon.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/kigefugafonuwokezogeka.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/75932517931.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/kexes.pdfIn PDF document text
    • http://krcatikyonetimi.com/userfiles/file/82311416856.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/60284486399.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/mafofema.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/35357584746.pdfIn PDF document text
    • http://thecuriosityshot.com/dulorobilunopem.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/91449769647.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/daxojipadokimepe.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/livozetumi.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/dc0ff82910b78c61cbf78c4cfccb2611/dunoxunomukomitusipoxid.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613074e732a9c---90453656082.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613589d6ca83f---59473813387.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/xejugudedelotiwefow.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/lelakelima.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/fijeli.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/d5bdc26ce220bd0abba748e9f9bc11ae/64157826207.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/todifinem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=snapseed+apk+download+for+pc+windows+10PDF 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_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 16956 bytes
SHA-256: c8265b4cc7c9c0cdb5492e228b3f8a2b553bde790b8fdc5c04112c71c6d112cc
font_01_sfnt_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 10940 bytes
SHA-256: 4122b9f8fbc759f30f608e73df51ff0f3d2c296f1ac1cb53f590e58d79faa06f
font_02_sfnt_off00011a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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