Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cb1e31f5603a2e…

MALICIOUS

PDF

81.7 KB Created: 2021-09-14 13:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6f1282c472fbe002f5a45aab0fcc5137 SHA-1: f5e194bc56dad8c13a68b46262b61ddbc8d60de3 SHA-256: e0cb1e31f5603a2ea63a2349d718a958b0e0a5e8253f78333e3cfc9ddffed794
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://uzsienis.cvzona.lt/resources/img/files/giwesasafib.pdf In PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132861aebd31---fopadi.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/gevogozopisogu.pdfIn PDF document text
    • https://ntc-container.com/upload/files/kimizilodegiz.pdfIn PDF document text
    • https://tessuno.com/upload/files/6137dbd111cd2.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/vemejufu.pdfIn PDF document text
    • https://casadko.fr/userfiles/file/46802185636.pdfIn PDF document text
    • https://nikolsbeauty.com/webroot/f/uploads/file/wuminegigazoziketigi.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/55634668450.pdfIn PDF document text
    • http://castel.lu/userfiles/files/kuraxesabutarupiju.pdfIn PDF document text
    • https://ceiling.holcom.vn/webroot/img/files/tofulifemusita.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/sibibataduxufizu.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/29886720686.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/sazawixi.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/litabibedevupilelulil.pdfIn PDF document text
    • http://cartopack.be/Images/file/wupizilekonipigiwunapu.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/vojir.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/gulipanuvaxuvumavi.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/64010625336.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/5038249608.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/gepavo.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/45609428070.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/55888958145.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210903_58D8DA55ED011EC8.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/88043469064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=fungsi+vpn+pada+hp+androidPDF 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_off0000daa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA9 10536 bytes
SHA-256: d398f8ae88915736e737a5a9bed9b74bb3b9c3ea4ea8e3878b0fdccc9a942988
font_01_sfnt_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 18100 bytes
SHA-256: 50913c14014cf2ad78039fe7646cdbb148a179fd0e4088fa62e031f796b271f3
font_02_sfnt_off00012172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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