Malicious PDF — malware analysis report

Static analysis result for SHA-256 06987278215e2173…

MALICIOUS

PDF

83.7 KB Created: 2021-09-19 23:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d74fb77ec7f6a2d8951b56dc8b81c275 SHA-1: 62ead9aab00bbab2a9936affe5aca23f61a47ee4 SHA-256: 06987278215e2173705c6f3c8c2dfd290638e8838f6bbd532751d0a266fcddcb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The document contains a large number of embedded URLs, many of which point to disposable hosting, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm strategy.

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://crysiq.ru/uplcv?utm_term=the+l+word+season+2+online+free PDF link annotation
    • http://elosc.com/upFile/file///ITX202109100017204637.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/46952080869.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/bewunetoxavozigopotas.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/zubaw.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/aaeb42026e8fe71699cb4331bf6b1373/60849194370.pdfIn PDF document text
    • https://ivanamihic.com/files/tekuvoxufu.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/55024884075.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/11481217178.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/zobal.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/lonefepu.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/xejesukekefineketazolemil.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/vugepujirarajodoluwiga.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/30469096147.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/96303673647.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/47309187767.pdfIn PDF document text
    • http://benrassam.com/uploads/files/gifezivif.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/xajuludajixenonexami.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/54973600156.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/75093938143.pdfIn PDF document text
    • http://hotechike.com/files/files/92197336331.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/74737712217.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/porowedafan.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_off0000e0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 10524 bytes
SHA-256: 377dfa0eaca8ea0dd6c16a782d02cd66697960526a15ff3e7e36cf5f5708c825
font_02_sfnt_off000110d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D7 18408 bytes
SHA-256: 2cd34b1e53a7e272dee2f536344657682d2766a67ffcc8c373b535d3273c0d76

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