Malicious PDF — malware analysis report

Static analysis result for SHA-256 267934dc814a4a28…

MALICIOUS

PDF

73.0 KB Created: 2021-09-21 10:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 62a219b328d6b440c53fe9d3c5578a07 SHA-1: 78fd5613ab9e911b2a7bb4bed390b10e2c01a55c SHA-256: 267934dc814a4a28fcb148cf21ed768243a7db70cabd8929bd1cf055f1bbe9d6
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to disposable hosting or are part of a link farm, indicating a phishing or malicious download attempt. The presence of a raw IP address in a URI and the ML classifier's high confidence score further support this assessment. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://fred-robin.com/ckfinder/userfiles/files/96523125320.pdf In PDF document text
    • http://tamker.hu/userfiles/file/88621608880.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9d6acc9ab---zorelinifugupifexekek.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/45610717325.pdfIn PDF document text
    • http://rayanchem.com/d/files/74469484475.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/19756358169.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/66600468345.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/17573196498.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/80498734714.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/kevifajisuruwokesasaw.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/92826624573.pdfPDF link annotation
    • http://ceraunavoltapizzeria.it/userfiles/files/83854982704.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/39518250648.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/wulenebezejawarularejo.pdfIn PDF document text
    • http://kvrhousing.com/uploads/bubegegipivujuligor.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/saxelakaruto.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/99328890153.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/diraxuperaribi.pdfIn PDF document text
    • https://jin-ji.com/upload/files/tuzowusavazagazefepeg.pdfIn PDF document text
    • http://autovoda.ru/upload/files/patinik.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/4a701e180d6e2c5fbba25392b020ce0a/xowuzosidugumixamogob.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021091816100926.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/fasonemezilu.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1613579104bf9f---vafowogos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=gta+5+online+mobile+apk+free+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_off0000ba10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA10 16880 bytes
SHA-256: 5502120f4c1ad9488fa5ea00fc1afc306769072146c74c80125151b63dc87530
font_01_sfnt_off0000e4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 10980 bytes
SHA-256: ced240513dc2c221a7e6ab18d92591c68bea7187230d22b9afe86ce778f90a94