Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32e48606a3fd020…

MALICIOUS

PDF

71.2 KB Created: 2021-10-04 00:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 06618196bb6094d1880a135d19adb41c SHA-1: fb7d77128488e10808f0fc656ab7366979c00c4e SHA-256: e32e48606a3fd020994f9698849087cb5b87e09ffd81a889a7a0871d9851058b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. It contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to obscure the true malicious destination. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior, indicating a lure for users seeking a 'company profile format'. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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.
  • 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://chcial.ru/uplcv?utm_term=company+profile+format+in+word+download PDF link annotation
    • http://zenpersonnel.com/UserFiles/file/65903374971.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/17327407116.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/kurax.pdfIn PDF document text
    • http://potlista.com/file/files/porevesurivaziromogitakiz.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/18911264705.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/77388149470.pdfIn PDF document text
    • https://xn--q3cceuw0c6ab0d2ii.com/upload_file/files/mojewepikaxomajefofe.pdfIn PDF document text
    • http://shopabrang.com/images/files/tekemilililajupabafurax.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/dibopevurolagilejobero.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/muniwanevimi.pdfIn PDF document text
    • http://indah-education.nl/userfiles/file/69723825111.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/57088584976.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/kewadowisu.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/613da2863f3d8.pdfIn PDF document text
    • http://showdoimovel.com/files/files/72823163151.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/92522553241.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/xukemopuninameputubugim.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/mowozodisevupepimero.pdfIn PDF document text
    • http://az-volnycas.cz/volnycas/fckphotos/file/sarafisowipixalobewijuj.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/jasumidodokinas.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/13253234625.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/53398934280.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_off0000b18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A1 17144 bytes
SHA-256: cd1beef41ae969869ddce9c16309dd350bb13f4551daa1fe80e9cd56102226cf
font_02_sfnt_off0000f4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D0 10720 bytes
SHA-256: 8d25939f0a691fde7dbb4d8e3d8977e2600230f4ba8f52bfb5de79f1f512387b

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