Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4d10a84e90c32f…

MALICIOUS

PDF

82.7 KB Created: 2021-09-11 05:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1ed31ec74ff9ddf35dd31fea28531cb4 SHA-1: 92536477f42f9201b4e715f8df7b48e6041afda7 SHA-256: 0e4d10a84e90c32f75d6f8969a733c5b0f710319c1db5f0dd41a54e7d7b04000
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm. Numerous external URLs are embedded, suggesting an attempt to redirect users to potentially harmful content or for SEO manipulation. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://expomediainc.com/upload/file/wikelovesererabel.pdf In PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/2698906935.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/71874333081.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/34963891623.pdfIn PDF document text
    • http://teraval.cz/res/file/bubipegudexijopaduwimefak.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/jolineposak.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/46389805731.pdfIn PDF document text
    • https://renetravel.ro/images/files/bagux.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/56437630371.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/jedosiwizudawiwefo.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/63292403662.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/sefikonutadakewawebax.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/42201169256.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210903_191837.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/8520836010.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/14489840022.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/66180649708.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210910_C89CC22EE8A23B12.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/02220c10b513a21a8a91b03d007126a5/85797593971.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/83041579433.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/84082735076.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/41121805314.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=fps+tracker+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_off0000e0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 17148 bytes
SHA-256: 52e6997811a33d396ade10cdecfe0016fba25ca3cd32668b0be1339819d181f5
font_01_sfnt_off00010d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12542 10528 bytes
SHA-256: 6ebcfb0a6b8a5bf2d3caec7bc781a8b3df6cd8aa50696fc4f85be95cbcc00b4d

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