Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc75b7647cd466b7…

MALICIOUS

PDF

75.7 KB Created: 2021-09-18 07:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: de29d7a4de50157f6891934606a92326 SHA-1: 5c214b738ebe9f54ac5f31a3bf48c494421cad98 SHA-256: dc75b7647cd466b78675380a0e894f0dcb4e85c10d61400c691fac78947c0ea8
142 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 external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of urgency and download button lures further supports this conclusion, indicating the document is designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=tiger+zinda+hai+full+movie+hd PDF link annotation
    • http://ats-dz.com/userfiles/file/wijugowoparopuvapesudoguk.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/97675124589.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/vodofabobinamozov.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/95653655303.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/nazemeliligabunumopo.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/76975281862.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/53349957058.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/zezixopaxusomawopejedapal.pdfIn PDF document text
    • http://savemaxint.com/files/file/makodusuduput.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/44504994995.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/tididevab.pdfIn PDF document text
    • http://asid.rw/userfiles/file/zepuzifesepife.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/jotirawevaxediwutaved.pdfIn PDF document text
    • http://exim5.hu/_user/file/kijil.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/jelaxorunezumi.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/64223764588.pdfIn PDF document text
    • https://armenia4d.com/contents/files/balajoxin.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/15265027405.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/kanavezomidetabedaka.pdfIn PDF document text
    • http://inistor.com/ufiles/files/zomufalaresoda.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/kabiduwe.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/ragezibazenubuzi.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/ketojusebanav.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/99498669904.pdfIn PDF document text
    • http://1666-3668.com/attach/userfiles/file/soxukopapep.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_off0000c16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16D 18148 bytes
SHA-256: 444ceba21a8f2de53a368fbf0f60838d74ff31a6309b029473852790f7a29a3d
font_01_sfnt_off0000f0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BD 10724 bytes
SHA-256: fe55b2e13bac2056870fb8629cbfe36c5e8ff3c7c31538dfa2a617f567e33d34