Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d837039349b770…

MALICIOUS

PDF

82.0 KB Created: 2021-09-18 06:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1b003fe3cb85c5e1cf38d40db8b9e3b4 SHA-1: 97fa6012eda8d9e03186fcccb3c0a228dd5f4e09 SHA-256: b0d837039349b770ac07bdd0b3f6229d7f31be21c1a13b16f1855bb9dd6b567e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a spearphishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=india+england+live+streaming PDF link annotation
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/tozetoxivenolujadujixof.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/luwufirasubunela.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/nodejesisaf.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/29695889988.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/vibenenufonilaxotekodip.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/o7tl5ft3f5u0j3ob6v4g5gm50t/jagito.pdfIn PDF document text
    • https://kratky.eu/files/file/18588400799.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/motatomajavofiwir.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8998f979b57e4147fd0238477c0ed6b7/juwogajozipera.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424dbdf097e---76708692541.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613677c72ba59---8787044247.pdfIn PDF document text
    • http://sbcnepal.com/images/file/97812489961.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/67034640068.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16143037aa5eb8---14833715740.pdfIn PDF document text
    • http://njchemland.com/upload/files/10017471577.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/54304275492.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/4b78627f3c67dbcde821ff7acc805e09/75000888310.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/1f46d0e8007221ab4295d7ada192131f/75552593075.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/60205037047.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/38225873785.pdfIn PDF document text
    • http://zima.italie-ubytovani.cz/data/file/fenabowu.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/lamozavilinisas.pdfIn PDF document text
    • http://www.bash.cl/media/file/28963710450.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/maposagapuzegap.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_off0000ddc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC4 17476 bytes
SHA-256: ce52410fed9ee6021b9c8ce40f2186b52eac4350da38fec87ac5631145eb1cb6
font_01_sfnt_off00010b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001233a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233A 10488 bytes
SHA-256: 4075550e1171c11757101c3bba673ce0c2b8e5f3bfb25eed9f9acf6bd037273c

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