Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2d114146f6a1dd…

MALICIOUS

PDF

87.7 KB Created: 2021-08-20 11:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e00a01937ce7f8f19f3a53cc24b0a517 SHA-1: 050737c0ec435c1170ce40676f1c137e95b64df6 SHA-256: ea2d114146f6a1dd90bb10d51aaa3760802de6d333036861c163a5102c0ff692
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/0948e58f85c8148818d04c9b9a5a9cac/21535852622.pdf In PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/3c9e1f07a2c32e8035adb43b7abf6f6c/48697857583.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/385cc526160ddc3b06d5c12a2635127a/32531415534.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///13546300727.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/dc4e9cbd6be6e50f578b4f798a3216d6/zuvudinemuxufon.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/13254952102.pdfIn PDF document text
    • https://securitydm.com/slicice/file/nanixadosufomipoxo.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/37766190156.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/zetugebimurekupoxaw.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/4p5nne11t4e3f5aah2tlbu12eq/gifabikuroperomizir.pdfIn PDF document text
    • https://wittnebel.dk/file/54171812582.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/temiralukixupefibok.pdfIn PDF document text
    • https://samtee.com/admin/images/file/zalekiboxibadopoderi.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1611935d012544---tagave.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609846ff37092---fewufazepexusupi.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/6803801327.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/44800460511.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/45824758012.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/d99c2dc228a44b0a4daa2bfecf432a05/nawuwijezu.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/dofofim.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-4-29/20210429020656279818.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607042846355f---70824407226.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/57984627488.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=kim+kardashian+game+mod+downloadPDF 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_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1D 17372 bytes
SHA-256: a5d87dc1094148b784988d5fd8c8cd0a2a32875187afca0441b3b9eefefd4491
font_02_sfnt_off00013860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13860 10764 bytes
SHA-256: c39cfbeeb2b4620a1774cd795ae25136c42dba7c377e93915dff3541eb71d64d

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