Malicious PDF — malware analysis report

Static analysis result for SHA-256 faeefca612b467ab…

MALICIOUS

PDF

77.6 KB Created: 2021-09-05 17:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 66df541c719cb5b7220e579a2d10fdd5 SHA-1: 366cc83c61334a62baa31e1bf55a48d044929e40 SHA-256: faeefca612b467ab4e6cf0519d86f7d5bf48986960f28263e036adec44afd37c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users. The PDF's structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://drivetripper.com/userfiles2020/files/18349763452.pdf In PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713b6856764---nimemut.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c44f1c210ea---43299673900.pdfIn PDF document text
    • http://scantech3d.com/files/94148420908.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/19668292252.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/kowawafopafuvefapavoxuvuf.pdfIn PDF document text
    • https://retta-bg.com/userfiles/xavorasunuboduvaxiguk.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831ea06ec9f---tolexaduk.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/nudunefuv.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/tuniviw.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/2b1f5ab581ce6f3b012e85187d6da461/75798756207.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/2091596385.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/95962889823.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b86635a5cc2---luzodojebawukiginozegim.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb31f256b5---pubefenam.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dde3f7ad0b---damezebigamuwuwepaxosas.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/96155000038.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/nigome.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/sobujalines.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/jukimigukagorimoz.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/56057982542.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607252d012cf8---48534584059.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16101136e54ad6---845991638.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/lurufevikagowatiweguza.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/jigaxugekefu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+are+ionic+bonds+and+covalent+bonds+different+worksheetPDF 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_off0000cb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB62 16988 bytes
SHA-256: 4b9b2fa30982809169667e6b76a49bf98aab801856a580a462afb14235184e45
font_01_sfnt_off0000f69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 10948 bytes
SHA-256: eb68ea1a2835156fc63ba6388a29ca674fcaa37b87516e9394902fdffdc643be
font_02_sfnt_off00010ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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