Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ba050d8ebc370f…

MALICIOUS

PDF

99.8 KB Created: 2021-06-13 08:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0365be5f5496c6fb92f9c9e8c2593acd SHA-1: 705b947a75650d42c8e3602a19b159bec733c60f SHA-256: 54ba050d8ebc370f0d859802bbd8fc69df04ea7a783b3d3b68749f09c81a5d36
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://garglob.ru/uplcv?utm_term=colours+rishtey+serial PDF link annotation
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/47be4b815f8ef79a848849aff7a6ca69/7027382060.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073d5256efad---46037113359.pdfIn PDF document text
    • https://egca.fr/userfiles/file/67685288335.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/baliranadodugetap.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/luzifavanifobopijit.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ddd69b5e4---zisufataxisetoxurivejop.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/6ca81bd60ee768604842ac8f27ef0da6/71267159107.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/59885286207.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f36020ec1b---7469630692.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/96848507486.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/up1rq7af4aqviievj59bu1or3i/85498514881.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e1034a381---regogesiwadexewuwokav.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37eb63cae9---wuwesobekilijutogimuponis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C3 4780 bytes
SHA-256: 441c3278be93cefd71462de43cc28a9908a5815df5e31a8f65900958c1a2b1c4
font_01_sfnt_off000126fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FA 2284 bytes
SHA-256: 6450e3acc846807893a3b164798628c7801791d59823fb0b765a9d2e5718ddc5
font_02_sfnt_off0001310f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310F 11732 bytes
SHA-256: 33fc6d060a8d372878f8aece2cf961e8416e59fc84508229292bc98b2a6400de
font_03_sfnt_off0001590e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1590E 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
font_04_sfnt_off00016e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E63 5260 bytes
SHA-256: 065ef885032e7c5dd528fb10b8461e1dbb776569257e56a55e8f28a2b8d104f3