Malicious PDF — malware analysis report

Static analysis result for SHA-256 337e2eaf3a150347…

MALICIOUS

PDF

87.2 KB Created: 2021-09-05 22:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3e4b3f61d4905da4833a1107bf7f4324 SHA-1: 8ee94ee6b07d36d4f35beda3e2c60fa1aa5df088 SHA-256: 337e2eaf3a15034740540e9d03ffbdef00482c8afd44a2b457f65d4c5ec64176
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=agricultural+marketing+channels+pdf PDF link annotation
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/3c85ed883da49fe447afe6565f0c14ab/bamepojowovit.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/50383571350.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611da606c2227---88020668620.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/edc386bbcd91e7a49647ca17a2845b12/38511248208.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/waxizesodes.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/71002601522.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/88542105695.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/sadubajamepawiziwakizujap.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1f0442b375b37d1ac9b5c8cc3f176e69/zatef.pdfIn PDF document text
    • http://irollee.com/userfiles/file/46437136041.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d6322586e38---vapejoko.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/nedizupe.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/wutubidovo.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/98597902279.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160f033aa9f2e6---53505289934.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/j8okdnnl9gnifshj93s2m528n0/muvem.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/lafovenobenon.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/45770028891.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a86ef59729e7c4fbe28cd93073ad7fc4/42518515739.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a994329e23a---41934200508.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/18463299484.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/rawuzitatow.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_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 15072 bytes
SHA-256: d18d0ea7ceabf5540bebfce59576e465289130fd9b3d9e1e70a6736d53c91cca
font_01_sfnt_off00010808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10808 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001201f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201F 17984 bytes
SHA-256: 1785750fb7350e8a4aaa1b9ded79160dbd5bad2bca8dfcc957fa1adcf7bd91c7

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