Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b29f707cb12c91d…

MALICIOUS

PDF

80.0 KB Created: 2021-06-09 17:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 40e4e55ea7fd7aac1589b48f0c3d61aa SHA-1: d2c2a9d32509b9672c139fd3ef378335a181f961 SHA-256: 5b29f707cb12c91d723864af1ad3e169e89f44e62341ce2585ccb2ff544107e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the heuristic firings point to a phishing lure disguised as a download link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=atif+aslam+song+khair+mangda+mp3+download PDF link annotation
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f93e749bf---nobawudipedavutifegegu.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/dajujoxo.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/lm5spqai4mj9bq5acb56l2j854/1737660954.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/xekafutikojatanemibim.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/0eifjb96etb8f5bh0b1f004rt8/nepopafuzasituliwesoduxo.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8fe45389f---23533612389.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e887e0bf0---ruxidiwepagiwegojenifara.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/76871556229.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/b7f96ff89f988fdfc3ad0cbf5b1444b4/xewipefixavexozodusolozi.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1d48d5b5---17231002214.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4dd8dbfed---nifupavipadiwalarilonej.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dbae64f9b---tinebikodap.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/depor.pdfIn PDF document text
    • http://firegallery.ru/img/upload/34554171918.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/bejesigufajuvikegenufap.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16089dc3bf377f---ramaza.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/d42367459343d5c31198b4154feb82e7/82223663858.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 5764 bytes
SHA-256: d14c6e3cf7e7af86cdef87557d43ccbf8b86f23b3cc8b47343d84e92ed43e0b9
font_01_sfnt_off0000f466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 11452 bytes
SHA-256: 7f79fe37f50129a95a5a95fd923a52d511ba6ec54e5f946f2d77d424ffb5548f
font_02_sfnt_off00011b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9A 16676 bytes
SHA-256: b9c317f59f28565b65e0f28ecf1b070764e48d7a572aa1855f62db06b8407904

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