Malicious PDF — malware analysis report

Static analysis result for SHA-256 db601914765f011c…

MALICIOUS

PDF

84.0 KB Created: 2021-09-11 03:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 968c60d6812c046680d22a73d8d77468 SHA-1: 623d2a7a242c3fc1f54c7f773fd8af5230bf49c0 SHA-256: db601914765f011c0a1f2aaa2d4c8823e415596ce8880f6f2443d06f2599f3b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=rabbitmq+android+client PDF link annotation
    • http://abc-tel.ru/data/File/pusujovelediwu.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613406201ee9c---29836119686.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/61320026845.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/momididamipisotumuwa.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/dodopug.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1630688568.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/1872128225.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/90599519860.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109051523339754.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/vudilixat.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/xonin.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/45993235895.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/74163523234.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/zarog.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c51ac008d---54544020149.pdfIn PDF document text
    • http://nhac.ditimchanly.org/Images_upload/files/bekusaxikajamimazal.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/175a9eb5c6181871467647056ec26f8f/28863185720.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/161337acdc08c6---42265446450.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/3bn70d2cqt5c4093s66jgsmceo/gabasotuzaxolejeruxuse.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134c51cb06ba---vemikalopenajakokufu.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///pupugegoluto.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/45489425785.pdfIn PDF document text
    • http://michael-dhom.com/webseiten/file/loxoxizumezatepez.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/biwojesedadez.pdfIn PDF document text
    • https://clickbox.ro/images/file/19468855676.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_off0000e0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 18520 bytes
SHA-256: 6254e1a445145af01d5099fde6a27835038092a4e797d800728fdba6d2d82847
font_01_sfnt_off000111d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D0 10696 bytes
SHA-256: 3c6778889f3ce298eb291783d25fbf7bdb2eab414a07caa428f2a500d09d452f
font_02_sfnt_off00012a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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