Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e01060e142bf60…

MALICIOUS

PDF

73.2 KB Created: 2021-09-11 17:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b38c86dc19fda9ecde3f52444371912f SHA-1: 4572be574e8a18b20435dd4d36ecdb6863ae93e9 SHA-256: 45e01060e142bf60ce24aa75c9f0613066ea01f1e63fb53350ae6e11bf7a4dd9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of external links and the nature of the heuristics strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=star+wars+rpg+pdf+force+and+destiny PDF link annotation
    • https://numen-wow.com/userfiles/cloud/files/temenoj.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/loxabaxanafeboti.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/95827764524.pdfIn PDF document text
    • https://negaratoto.com/contents/files/gulejunekabuwasap.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/mivaboroxoketadelukizudu.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/53500368723.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/jutebosavutefomem.pdfIn PDF document text
    • http://htwy.com/upload/file/bajusadowonav.pdfIn PDF document text
    • http://skupka23.ru/upload/m/68104035965.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/vubufax.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99660353491.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/tobewej.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/68928826678.pdfIn PDF document text
    • https://music-group-store.com/upload/files/27272461165.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/pebimo.pdfIn PDF document text
    • http://villacappuccina.com/userfiles/files/labafejodasasodomon.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/28233377246.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/57e067170eebd3ab91ca42b4da4ceb24/63923167535.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/lumip.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/fefapugoxiremupur.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc3c3d3429---rukenibazegugisezafasado.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/vuwatarefosizawomunutape.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/1606009674.pdfIn PDF document text
    • 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_off0000b986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB986 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19D 11024 bytes
SHA-256: c8b710bd2ee7d48cdefc64900f4da880b218d38b882eb0ab4d4ce2cd5c0ee00f
font_02_sfnt_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 17096 bytes
SHA-256: 605d1833f7865928aa1ea92b50792cb59c9cfdbb3a5e0af57d2d55314f5745e9