Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02f1ae0ba69049e…

MALICIOUS

PDF

96.8 KB Created: 2021-10-22 19:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e02ff59250e25dbb575c442800f3d1c7 SHA-1: e3241318c892cf19bf7e507dfd0ec00e09f81652 SHA-256: f02f1ae0ba69049eee5d6040131777bcdf24f19e45a8688455162999a551dd46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://chcial.ru/uplcv?utm_term=earth+science+regents+2013+june+answers PDF link annotation
    • https://e-motorcycle.tw/upload/emotorcycle/files/kexekekave.pdfIn PDF document text
    • https://maurinet.com/userfiles/file/dafatujanezemagexovojadap.pdfIn PDF document text
    • https://mimzyonline.com/userfiles/file/nezesemedaxilenewuwadedum.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/24060326044.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/79167736521.pdfIn PDF document text
    • https://unchiulmihai.ro/files/fckeditor/file/virif.pdfIn PDF document text
    • https://marcel.myagenda.cz/pictures/editor/files/wesapamiwolo.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/9750244086.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tafomojurovefapepujeze.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/66478928416.pdfIn PDF document text
    • http://come2menorca.com/images/file/dejorabaxevufedawuv.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/wipoz.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/mt9t9q3auto731kj8pel9bf518/pikeretixib.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/23423627482.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ciclfi39o22f0afvu1ou2di5n7/xewumujemeto.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/cmjqg6v9mpjcv9g9j1uu050ve5/33491563721.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/nimazizozusabagilaremukot.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/1t1qv6rpe9slcfv465tgrm1rfg/finodemubefixasebutunaxe.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/nojezarixasev.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/54146018203.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/569b6fa9659f5b36be1aaecbdb247263/94971955244.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/95671811773.pdfIn PDF document text
    • https://klaipeda.cvzona.lt/resources/img/files/makexodiwotabed.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_off00010ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F9 20312 bytes
SHA-256: 524cd06133ae36403e178a0cf53d36e7d70a09a577163b00afd0dbc025eb2be7
font_02_sfnt_off00015b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B3C 11108 bytes
SHA-256: 86552c32738cd94a1256d1676e7180e8a4d054f4775b30a7ac24d3840212ff17