Malicious PDF — malware analysis report

Static analysis result for SHA-256 9466a1e0399628d2…

MALICIOUS

PDF

102.3 KB Created: 2021-07-22 04:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 227bb8a56232403192645f8a71002069 SHA-1: a5022fe20c5ff2052da9dc36b676dd10b1b93ad6 SHA-256: 9466a1e0399628d2284009ccae204b9d74fc31de5d9cd99237cd524fab003847
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9b51beacc---62484985310.pdf In PDF document text
    • http://jump360.co/upload/files/20210620132520.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/xafikipasoxukisotuji.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/rixujuwir.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/zupidubulutuz.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/vilifajajat.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9ebfeb3cf---81082657539.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae93dbf60b---7448502751.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075c13f76a91---guparuvigaxawoleto.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d63c1d8f66---vesapopitovusuveji.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/6cca70bbf6f1ba37843b4e86d2447f7e/20246520591.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/48f0ee0bec744af110eb44e7d486a132/wobewinawepemekulekotoz.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/jolurogixujipuvemet.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/vixexiveduxo.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/negubuzo.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/5cd82839b37204b97c840a338228fe2d/livoraximo.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/is3b2mjncdj101ne3cclievng5/77462532537.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/5b9919b0f5aa78c70efcee2ec9a19e0c/69054284311.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/614c0f35c80efb4dcc0731e4e0e172d7/vojobotis.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6dd0580e429b1a347af93d19409e2745/kogilevanorinisofoba.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fff15e9ef---foloxunejewiro.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/wixuxanefofikatazeko.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/76528176982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=letter+to+win+her+backPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBB 17964 bytes
SHA-256: 80d7b0f8f4f9962b33c36be30b083cee75a7420218253d9970525c766d8b9fed
font_01_sfnt_off00015a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A9D 10388 bytes
SHA-256: d60a2b2d2a82076a36f66150b5a04c07e78f63578bbffb966e2984e1426786bc
font_02_sfnt_off00017219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17219 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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