Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01566e0364bbebc…

MALICIOUS

PDF

79.0 KB Created: 2021-09-20 02:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9467eb8f5e5b34cc319b6f60cdbd6369 SHA-1: 82031f50d189576897a4cae67e9a920ae13a7c98 SHA-256: f01566e0364bbebc6b21c3b567169e576c828de864198697f9b2ed3ba73e01d8
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://catamma.ru/uplcv?utm_term=24+news+live+malayalam+live PDF link annotation
    • https://ontech.vn/images/ckeditor/files/wijiwasameroxoposede.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/34797285182.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/wufopukazofe.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/dimisa.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/44556062805.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0b362cbd8---22631703769.pdfIn PDF document text
    • http://zhuxintrading.com/uploads/ckfinder/files/20210905/16307932855201.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1612f792e1811f---xuwupem.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/33052262868.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/nutire.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/83453610357.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/bulaxobinivekik.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/33260030102.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/domopikib.pdfIn PDF document text
    • https://rubfila.in/files/file/rozelebasevibasa.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/43009803549.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/lifewulirewasasojo.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/97842420087.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/24696239543.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141ec351726c---vinevebijum.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/xamijuta.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/b91090214192cd1f27657c4ad4e5740a/5569628855.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16305333861527708982.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_off0000c969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC969 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17B 19960 bytes
SHA-256: d400cd1dd6c663c56ecac75acae39b999854ce59ced35d5875a03b53024341af
font_02_sfnt_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 10320 bytes
SHA-256: 03cd82fbb2408db56dc7168b7793f336157ec50ac734beb7e0ee7a234e81c054

Open this report in the interactive analyzer, or submit your own file for analysis.