Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bef89578f10b6a…

MALICIOUS

PDF

68.4 KB Created: 2021-09-18 17:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4028692f2376da9c171dae00cf0b3c1f SHA-1: 222bceb0c4b289a0f44e89b40a71851a3d6436f3 SHA-256: e6bef89578f10b6a2dad0d2f0babf6fdbf6776498365a6896624201d1e33d4c7
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://jbdclothiers.net/emailer/userfiles/file/65176445106.pdf In PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/benozatokom.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/47099838238.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/lasibaduwoluxokeg.pdfIn PDF document text
    • http://dejede.com/userfiles/file/jinaxamelat.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/luzefumu.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/77630371277.pdfIn PDF document text
    • http://fatename.com/uploads/files/202109130937241992.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/47458051981.pdfIn PDF document text
    • https://booking-news.hkdnracing.com/webroot/editor-uploads/files/mifadifamo.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/28071994435.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6d43bc2c6---sejavudunonisifi.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/xagazipowerukogu.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ca17294460e42aeb97f62a531a5a243d/xesipunevar.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/27718693702.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/74678826624.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/bomavojexereze.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/66649624546.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/zopov.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109071059328333.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161326e71284ae---72357018304.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/67465084429.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/fasawemuzawuvomudaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=android+vs+ios+2016PDF 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_off0000affd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFD 10312 bytes
SHA-256: 428544c8994b57c5db7e56c1c807136af74baa31db883fac708b2b7e7c89f591
font_01_sfnt_off0000c769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7B 14848 bytes
SHA-256: cf6158acfa726cecf80bda68f855ba9e36b80b93e7972dc4c2deb972ea283680