Malicious PDF — malware analysis report

Static analysis result for SHA-256 214f6cd96c816921…

MALICIOUS

PDF

77.8 KB Created: 2021-09-16 05:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f74fbb1a016ff4841e2767814ea46aa SHA-1: 40b1202fd32db4b864125442ca822e7266068f8a SHA-256: 214f6cd96c8169212e107c7c7f5e1e4c8b7469d828cd41b3a6aafd795836a716
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the detection suggest an attempt to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/1c76fq7hkumoimkf9og47vrluj/17838928360.pdf In PDF document text
    • https://szallas-karpatalja.net/upload/32782645164.pdfIn PDF document text
    • http://gewald.ru/content/Files/kezotibuzapas.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/maxejazorutedukiriwa.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kogodikepapive.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95876908797.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/30955122830.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/goredojibireru.pdfIn PDF document text
    • http://irths.com/upload_files/files/biwug.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/99795932512.pdfIn PDF document text
    • http://novafish.it/userfiles/files/67781101817.pdfIn PDF document text
    • http://thongthien.vn/upload/files/97277150780.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141aefd48f95---ludegavi.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b3216a733---92974102540.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161302555b0b05---webose.pdfIn PDF document text
    • https://scout-educationguide.com/userfiles/file/98002398538.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210903_B0C320B07079C89B.pdfIn PDF document text
    • http://parfumland.sk/upl/73481561627.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/mupesovan.pdfIn PDF document text
    • http://isvpro.com/custom/files/80506302640.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/16071276631.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=all+online+bangla+newspaper+of+bangladeshPDF 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_off0000ca5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5E 17592 bytes
SHA-256: 8274af6c1a81286087ebc38daf775653d85fe08b6f7c5384f3fd69db2b615aee
font_01_sfnt_off0000f77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F96 10888 bytes
SHA-256: ba83513a1494ddb32c9b0a6d85b90332bab1ff34885f5451c782ae4952279a21