Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abdc26bd7fd8a59…

MALICIOUS

PDF

73.1 KB Created: 2021-09-11 20:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d46b683cfa527514524af7f0ddc4e38c SHA-1: d8342d56232d7f8680f1c0fba0280976f0b46033 SHA-256: 4abdc26bd7fd8a59242e69ed2179e13d293ff0a5a98c5d11e3f13196b4149feb
126 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. The heuristics indicate it functions as a link farm, directing users to numerous distinct domains, one of which is identified as potentially disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://aescantabria.es/upload/fckeditor/file///nilalabevalirizo.pdf In PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130db9ebefbf---zogeziviw.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/domulepit.pdfIn PDF document text
    • http://24cvety.ru/upload/files/91191280794.pdfIn PDF document text
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/tugawur.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/xidezufikagozolutusim.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///giropemotufowiji.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109080625038463.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/54836288874.pdfIn PDF document text
    • https://edarky.net/data/file/bizebufibotex.pdfIn PDF document text
    • https://aahs.givingplan.net/sites/default/files/editor/file/xibowotojasesa.pdfIn PDF document text
    • http://envigest.cz/upload/file/dibiwanomodofamupageriw.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/3389881276.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/11387446418.pdfIn PDF document text
    • http://www.milestonesmn.org/ckfinder/userfiles/files/memitabijofuxidaxovigewi.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/tugonebaw.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2a27cae41---mezajevuromipono.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/63735065352.pdfIn PDF document text
    • http://upakuika.com/img/file/legokogo.pdfIn PDF document text
    • https://aneri12.cz/res/file/5603786075.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/8217032404.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109041418475282.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210904_5F0C624D42BAFBCF.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tavojopufix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=fashion+words+that+start+with+kPDF 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_off0000bcc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC3 10324 bytes
SHA-256: 4548d459e773e33029e3621a7a5f7ce6e4fedf5afda34e30b44ac2242619147b
font_01_sfnt_off0000d408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 16612 bytes
SHA-256: 873bfb4e423c41bab657d6cd5b03b878e8aaba3af779ca705d4c3428459271ee