Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bb5e6895669303…

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 17:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a95333b0f0919c6338d2f2b1d600fbb3 SHA-1: 679b47281fc2d8ff4786101823286fb9540a6655 SHA-256: 46bb5e6895669303f0faa8469b52ef0228b40e717153cf35b33052790484632d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, forming a link farm. These URLs likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nomylo.ru/uplcv?utm_term=rc+airplane+magazine+free+download PDF link annotation
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/5ebf2d4c0355b497cde3a88fc7e440cb/58599905736.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/61547324227.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126b7279c05d---sajidekolizukiviwe.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb022d7694---bawino.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/96325703176.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/lekikepizovuvirulusodom.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/61412666027.pdfIn PDF document text
    • http://dakmet.pl/upload/70610335411.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/wamomadowapefevadigo.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/fajupuzovawewal.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/dibedidojuwulusu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/mbkhjsf7on19m1sd8o9sk5hfp6/88875684113.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/39935167802.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771554d4ef2---gadidusejaj.pdfIn PDF document text
    • http://alkanboya.com/files/file///mufujikave.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/9571c35430f6c16c935fda10bc208d12/42653363079.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/jenikesetasaren.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/57692188306.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1620640194.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/pojazekoraxajunodu.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/8c94ee07f06c0af6bd2951f0199364be/tiregeti.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607282948f13f---tudoduxif.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_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 17264 bytes
SHA-256: 2a55880c8397446a210e50cbd7b64213d72c97963b2a0ed35b98e6fdcb9b5301
font_01_sfnt_off00010c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001244c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244C 10888 bytes
SHA-256: cb11329177cc6eef66fef7bd3e851c33d82161a7e4a26d39afc7b909b90b0817

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