Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2d32032ee4675c…

MALICIOUS

PDF

94.7 KB Created: 2021-07-07 12:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5bc97b1dd6e4b2253a8cb573fa60e0f6 SHA-1: 9a66037e2989aeb28f6e225735fdb55dede7cf6b SHA-256: 3e2d32032ee4675cf84bcfacaaa306f1bfadd3aa4fb31adc419f916ce2b2d99d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca01d83f06---9351519619.pdf In PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/4729bjunv05rdb1p7bthu6suo1/14299168106.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ip9899fk5gkcgap40nea2qatp5/3806084923.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8535a9e747---samavuberomebip.pdfIn PDF document text
    • https://mszukam.pl/dat//file/24837301348.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796de8e1498---59966080816.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///67885367053.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/aa0440e2d3a23024310830bfa27d7d9b/77403211765.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/garuxapaluxija.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b8662baac---bufam.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ui3sq1qgg0h0dh4sprp584p975/womoguvobogisoja.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/80141729138.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210508141732.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/riwiberapelorul.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607be138ab9c5---81698635733.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47aa81646c---jubimigudulemuzatot.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6236de85b---womelonavevezujow.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/ketadl0r1sb5bm675i7jo70ov9/gepadoziwakunofawutimoz.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/buputafolajadoji.pdfIn PDF document text
    • https://slide-bearing.com/d/files/80861486620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=let%27s+groove+by+earth+wind+and+firePDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 17456 bytes
SHA-256: 1a04c48ce768840d497c897a76b069138952cb652310d4cd812cd379fed20230
font_01_sfnt_off00012654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12654 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6B 10984 bytes
SHA-256: 3a175bb893706ae3b8dedaeac2f40b2ef798b25bc56929717ca5b268a26d2e01
font_03_sfnt_off000157cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157CC 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46

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