Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb00c3a860de63a6…

MALICIOUS

PDF

87.3 KB Created: 2021-06-26 09:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7261cdb07ee85aded4bae5fbf40cb425 SHA-1: 2625af6f1d3a6ecd09a97ea43e23f4fc98817ad7 SHA-256: fb00c3a860de63a69b2e0add4c98d23619a7459f2be2e0cff02eca43eff10e79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://pnmanagementsolutions.in/uploads/loziwufivageku.pdf In PDF document text
    • http://astro2sphere.com/admin/images/file/78709772010.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2defd1cb44---55505389376.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07c31a37b2---raxobiminarurawakowud.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/lezitulezu.pdfIn PDF document text
    • https://fallsplat.se/file/77394093258.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/rigametorobi.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c60612b69---77266201297.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e9d17927ea960397253717e11c04473c/ridofujabinorakefuwomezi.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/38118496576.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a50933e925ae8083be35a35ba69ebe91/14823955112.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e8f2f24f5---lazalurafodubidazesozogib.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/1b89bfa81100a1fb831a11370ba7767c/tinesipejorelukezugipami.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/70593048910.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/26401435931.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/fobuler.pdfIn PDF document text
    • https://longhoang.vn/upload/files/pizuxegegikedu.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/32139299793.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/564880ebf85f9e9c4e847a03c9ecff40/41626843378.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/97beb0928eba5a7d8cee3699d95d932c/2663232653.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/db9455e6b52e14112785efff5843a328/rijisafugujimodosefine.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/2u667kgmusomdf3cmrg5a8g775/75889842339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=big+spoon+and+small+spoonPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 10456 bytes
SHA-256: 05cf2676f5670b1c38a2637643ecaa8e337c15567b92736371f1eeb0663c96cf
font_01_sfnt_off000108ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 17896 bytes
SHA-256: e25c7168e08ad1a294f76dd2ba05d0d9c0fc0a9e4b416ec11bd4dda559f58cd5
font_02_sfnt_off00013827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13827 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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