Malicious PDF — malware analysis report

Static analysis result for SHA-256 e213ba5d34bae8ca…

MALICIOUS

PDF

81.2 KB Created: 2021-08-05 07:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e42d5634558f643df02f8eba10376155 SHA-1: af52fbf50280b910fee9990de8ef88cf703037bd SHA-256: e213ba5d34bae8ca1a3dd467e70e85ecfd7f3bf9c5a44a6649606df3b732e092
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms and appear to be part of a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging strongly indicates malicious intent. The embedded URLs, particularly those with 'utm_term' parameters suggesting search engine optimization, point towards a phishing or malware distribution scheme, likely using the document as a lure for malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4541ec3195580a80f093aae080b60e93/tezatu.pdf In PDF document text
    • http://maszyny.pl/userfiles/file/mujojiro.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/e0d03b0acd49379f4aedd8f160c78b61/bepuvunirabigu.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/8519430518.pdfIn PDF document text
    • https://baongochoa.com/upload/file/wivepi.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/nibubipareminobipeloga.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086240c77648---jerixisurajifav.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/bf21e626a82ac716198c081d64d4df9e/76518626246.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609db256b0543---zewomapetokamakanota.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/pi33buq4j82b66pv5uhbt7atj5/wujixararimemotimufofizi.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/60055361384.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/mowabebidenarewuku.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609d560293ea7---xanizarudefode.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b882d7750b54edeefdc73ab588fa98b4/naritipifaxipawezunipipop.pdfIn PDF document text
    • http://pnalog.ru/images/file/zizivifetoxikas.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/al43vo6j744lbtp5ahvtdjl737/76828519252.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4fd72damodqiqgdnqimrs7ecm3/82478147425.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/jitoruwepef.pdfIn PDF document text
    • http://valeneighbors.com/userimages/bujaxovajipetogemixazuna.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f75fa7aa70---84273333302.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/19064430963.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d68401b145d---90244805235.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/34831742987.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/gadoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pokemon+monster+mega+evolution+apk+downloadPDF 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_off0000d808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD808 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01F 11080 bytes
SHA-256: c65f744ec5f3bc0c8c95e6ebb92c06017e1255c822bc5835c065d06f98b6a825
font_02_sfnt_off000109cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CB 17160 bytes
SHA-256: 91e989be8db7989507275afd4800d589f0814b8360e85af4fca7ff70f6c68490

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