Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4d54955567f05c…

MALICIOUS

PDF

94.0 KB Created: 2021-07-05 23:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b171087c27838402a555a14cf122e133 SHA-1: 257da74abdf009e9dbe0a8889a387aefb258841d SHA-256: 6f4d54955567f05ca8cba5326593f149c092014f692037a10f217d6d69d347fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a6aabe9867b426c462d5def95a15e429/tunolerubeluzamejizaselu.pdf In PDF document text
    • http://ecohost.ru/pics/images/file/palimubupajaxijetivir.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/mglsp7gl86fm9c29slh38dpgj6/kidodadadodawafo.pdfIn PDF document text
    • http://htwy.com/upload/file/kugenatuduxuzisipasol.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c72fe0b61f06e6ed9ae8725fc4391df3/64467672717.pdfIn PDF document text
    • https://666666.vn/upload/fck/file/74645439487.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c61e241ac---13068167639.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/62115031858.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/dituligajorol.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/tulerajibopul.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/95446488296.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/xigiloz.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/savokixapazevometuvelewi.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/dilivoduximitisuwu.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16070f8042b660---mexiwegixonevefo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d2725ed21---22211418337.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/mijirakpjsmmq2sioqj67nm2r8/benevoborozufif.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c36c6554d2b---67722173712.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/60694821614.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6951b75f9d---wuboxivadu.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/jk92ajs781so53hgaf2vshi7pa/96107950229.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf56a15ee6---wufiredifufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sequoia+national+park+climatePDF 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_off00010e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 10780 bytes
SHA-256: 105845eb0dff25baff1894682b417bc796182d604ac30d65be0b3a7bda5503d7
font_01_sfnt_off00012731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12731 16704 bytes
SHA-256: 2f2fe27868666d9875bc83a4f613c36fd82a964c19faa0baa09bd7fb5c0bdd0b
font_02_sfnt_off000152a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.