Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7eb4bdc1514e92b…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 01:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 493eb13ec42c4d0a5172e0354a918d5b SHA-1: c9112f4043172f7c599209138163bfe5cb30fd81 SHA-256: c7eb4bdc1514e92b2e61b35fd80da2d4300eddb41e8db5a8c0703a2b82255039
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external URIs and compromised CMS upload links points to a malicious document designed to leverage these resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=how+many+water+bottles+is+70+ounces PDF link annotation
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088bab1b6053---zesep.pdfIn PDF document text
    • http://normel.org/files/upload/file/bodep.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfba71214f---xasewukaxezakezo.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/htju8lo4bvl8cfd87lqgdd0s4o/24973624592.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e19b8b2a---rasevikabifuwizibukosita.pdfIn PDF document text
    • http://minicabii.com/survey/userfiles/files/zaxurirutokawepiwobotexo.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/remixozowagol.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/7746e9b2a135e8790566a91d7a2c22b4/zebaxumudoj.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/muderiwexivan.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607058f122e3c---guwuxodajamukalisupe.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607d72a363302---lanosuwijomil.pdfIn PDF document text
    • https://xn--90aweabvm.xn--p1ai/ckfinder/userfiles/files/40095171804.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6e76028ca---188228494.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2eba44e4358d754e744fcf638ef12d27/44599585418.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/rezejifoxilonudipivuge.pdfIn PDF document text
    • http://skomi.ru/img/files/file/gojuripokifotinaje.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/70691147733.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/28926274546.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d268166c0---52566557535.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc4c755b5---mebutaxopa.pdfIn PDF document text
    • https://mmszke.hu/files/file/30772998706.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/58202948861.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adb5e8438b8---zozupuposimevupibip.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/9085201859.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_off0000ea75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 17420 bytes
SHA-256: 12277d06233910cb87d5039be6dd10d22ac805254398ae9c1b750cc3d83f4218
font_02_sfnt_off0001304a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304A 10996 bytes
SHA-256: 83ac4c6342bfc4174f52482c6dee11abdff7b4eedb35325e07e35b657b23decf

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