Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc69267e982f274f…

MALICIOUS

PDF

98.2 KB Created: 2021-09-06 15:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cd996efff4ae6488f4f2c1f450932ae5 SHA-1: 58d1aea00a6dbaa1a25673c5911f7a868a97ce76 SHA-256: dc69267e982f274fb0e0f80a64394665217a991c5a5fdfa58da15c21fb35fd1b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal a link farm structure, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URIs, such as 'https://laborke.ru/uplcv?utm_term=components+of+strategic+management+process+pdf', indicates attempts to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laborke.ru/uplcv?utm_term=components+of+strategic+management+process+pdf PDF link annotation
    • https://bnovum.hu/downloads/lobudukugorezulakuzamu.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/97495823296.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/78108435462.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9c716e0922a579bfec21ed71e738e321/10123515531.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/sejefitujujarero.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/28954634734.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d5e4dd39eb16236b27d76189e0ea6e59/novawudiroge.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/17720893346.pdfIn PDF document text
    • http://df-foundry.net/d/files/xitul.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/97712115575.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608073a5218f7---gizilefavokes.pdfIn PDF document text
    • http://envigest.cz/upload/file/89934661363.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160985c450dad2---8240475350.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608447440d600---54869192459.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904538cd4d0---91892878992.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/f9bf5e9184998178f9e231a7a032e112/53922185276.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfced4beab---38610022844.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/vefosikorofamufu.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736720358dc---64180460996.pdfPDF link annotation
    • http://konferencii.org/web/uploads/assets/file/57059724628.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9991e262e---robigalomax.pdfIn PDF document text
    • http://zae.me/datafiles/file/pajalegogudasunumilobeson.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/bokofavagetipatufijoz.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/70326828260.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160e36559025a4---46397604943.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_off00011b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000133b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B0 17632 bytes
SHA-256: fc10ca570b4082b66474513f011872d1f0994a7d2cf4303b960005e43fbe4a6d
font_02_sfnt_off0001615e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1615E 10948 bytes
SHA-256: 2ad996c49ef00168bc41d018475d5409dd65155ad1fb259666aa7476e77eb31d

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