Malicious PDF — malware analysis report

Static analysis result for SHA-256 eade7d0cc3ff4faa…

MALICIOUS

PDF

81.8 KB Created: 2021-09-12 03:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 82a6af3f45ef07a8452bc456c3827ec2 SHA-1: f106ff01b79e5de9f9399b05781d1b5862885ed1 SHA-256: eade7d0cc3ff4faa37ded9b722c6e38245dc9114d50a2c03d7bc6c6c7322e7aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://tselectromechanical.com/uploads/CKfiles/files/maxofogumukuzekogozijig.pdf In PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/7es6tbf34s2himmneco73m8op3/24023330022.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355be630557---pojog.pdfIn PDF document text
    • http://cl-pub.com/files/files/tilalopimojezilobofajo.pdfIn PDF document text
    • http://kechengchem.com/upload/files/21684201539.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d32e93248d---jopojusizitibisun.pdfIn PDF document text
    • https://phongkhamtamthan.net/uploadeditor/files/dejuwi.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/dumowemuzusa.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/gafewebekanatuj.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/bodereje.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/lesude.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/83446534256.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/vuvonox.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/tasijomitojumubi.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/32461770117.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/42764405269.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/89291527565.pdfIn PDF document text
    • http://maydemtienvn.com/upload/files/pomoredevezumebewaxuk.pdfIn PDF document text
    • http://pneusmarene.it/images/file/dologujej.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/fizuwepapadepow.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/topaxuwomadubofesagitoxil.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/12530886046.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+see+how+many+times+someone+viewed+your+instagram+profilePDF 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_off0000d9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 17276 bytes
SHA-256: cf2fddd5944dedf968e45373a4cd06331f17d48536b57e5ebf00b7fc6b14c057
font_01_sfnt_off00010688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10688 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9F 11304 bytes
SHA-256: 935a53caeee93d08a62e2686b7b08f434c7e30a19bf639b7f05afe881c1e61e0