Malicious PDF — malware analysis report

Static analysis result for SHA-256 22440f0dbc607cce…

MALICIOUS

PDF

90.1 KB Created: 2021-06-29 13:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 61e961c20b61e1c8ffb65e5a33e51c9a SHA-1: 63e69e9b05b8cea7c53cc8ca8bb8e047d6aa2ab6 SHA-256: 22440f0dbc607cce1aec4f716a77ce09ec7a6820aad5a1a819489dfea3943be1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal Session Token

The PDF document contains multiple links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or credential harvesting campaign. The 'SE_MFA_LURE' heuristic indicates the document is designed to trick users into providing one-time codes or MFA approval, likely to steal session tokens or bypass multi-factor authentication. No scripts were extracted, but the overall structure and heuristics point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://laborke.ru/uplcv?utm_term=really+good+ads PDF link annotation
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/43061039071.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/foparipipebaro.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088e8115d55c---26595110967.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c4d9d3aca---dolumosazosajewugewed.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/dumajipovarewan.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/ccfe4ce226e8c72af96538575a0366bc/78706255186.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/chmstg44f9voiqbnpgpdrgiqrv/zabilefuroxugaposekoza.pdfIn PDF document text
    • http://merwepizza.com/upload/file/42804362701.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/oecfistdvf3o0ddfu9ru89cqd9/79896813098.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa67fc034b3---nugekemazefuvobuv.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/tesonejojo.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/bodibekavonesazukog.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/lipijitozewipawojumet.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a7119e98ad1---53604151650.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/ci8g9j811b359isi9bepqm4v27/kapojapipekeg.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/73348981369.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/18061658083.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/e58f534c53e7131ee189b080de53ef51/79627975184.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7ee84295e---makuvozore.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/18eb07ea20663ccd443a77af1434d78e/xabamudolaferijizoxavan.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85f7c4a963---93279642150.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/dejedisekukizo.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/77594202386.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a06fd8266f8---miburamufutedebos.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_off00010168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 10188 bytes
SHA-256: 685e3471844338997ee38700870db571fb50d26c1ddbca980b6ed67102a4af40
font_01_sfnt_off00011825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11825 16832 bytes
SHA-256: e055a3f75ac3223499a4f5cc5ef671eafd58f6a539438619b197667f6febb1d2
font_02_sfnt_off0001435d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1435D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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