Malicious PDF — malware analysis report

Static analysis result for SHA-256 e287ce386b2294d2…

MALICIOUS

PDF

108.8 KB Created: 2021-08-19 22:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2157cc5e6ffdbba215f08f50c4d93bff SHA-1: 9d2b7fa2b259798dba4f09a0e2d63a084866864d SHA-256: e287ce386b2294d258c852dcfc7f77b7773bf5c852bccbdc8d2afc71cf16f012
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading further malicious content or revealing sensitive information. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://smidgel.ru/uplcv?utm_term=official+dvsa+theory+test+book+pdf PDF link annotation
    • https://egca.fr/userfiles/file/pufezavuvolanuxumijisimas.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/jonafexizovexif.pdfIn PDF document text
    • http://rld-carbon.ru/file/kivazuzetekaveduzabaxuvug.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c10f254e6---92115948706.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/fopevezumonar.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/84a68f65d42047ccf98887c24eb5d36c/nepududoja.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee0edc0a10---dufoludaf.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3fdb79762---56616521834.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2728b52fd---31357117660.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/vapenu.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/47222069997.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/67939677040.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//39360095613.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085589d81cf6---tedinajuzofefurawam.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec9edccabe---budatojuterenekuvisuvikod.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/t95jjs2g92g3r2vkro157qd2rh/mefiwakepelumasukob.pdfIn PDF document text
    • http://apvn.info/userfiles/file/96775799342.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8ae408979---50505359092.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210725_FAD379B80FEBF84E.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc62518f992---71987657132.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160df78b383db3---xulopafawigubeweniloxak.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074120895ae6---90221944971.pdfIn PDF document text
    • https://patc.fr/imagesfile/rodofedimaparatexone.pdfIn PDF document text
    • https://suksesunited.com/contents//files/66254175906.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_off0001442c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442C 17768 bytes
SHA-256: 1c332ae23c257d82f32cde9b2bd6ce5f4eec802bf0350a1fa77f968693247f63
font_01_sfnt_off000172d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172D1 11052 bytes
SHA-256: 25ea0eedc321924ecb5550dcdb334e09bd030bdc49a5b09c770cb25100d491ba
font_02_sfnt_off00018c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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