Malicious PDF — malware analysis report

Static analysis result for SHA-256 683c217cabf006eb…

MALICIOUS

PDF

92.7 KB Created: 2021-06-27 12:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a09e3a6e2b5cb1db3342fdbae2bf8eb1 SHA-1: ec73b5b813e2bc768b25ad267d56b42e4f25916b SHA-256: 683c217cabf006ebdf59bc07d80c5302af0fa14329320259d352a5dff3e0ef67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised websites, likely intended to lure users into downloading further malware or engaging in phishing activities. The presence of multiple links on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/22b1841610871dc5e74f07d210f7f90e/xububedatebokukudeg.pdf In PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/fhpspg2a2qlustk5gonbjjqqer/panatowexarogilo.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d055ac3b291e8c1bc6aebe5d1f6bf5ee/vuwuzixuvuw.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/241837333690.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/wudekaliwisodotexur.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/29703894480.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///muwujotudutipo.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61ba757003---31682149172.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f4f24d39266f455f3a4eeffaee573e30/10896805583.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ce146b1d781---3230489328.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4fm9taqj6t1ekui51ua01ll16f/degurana.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/legakigij.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/vagenunisixosijapemabe.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/zelefexovu.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc87512dd90---zaninofoga.pdfIn PDF document text
    • http://accronline.com/userfiles/file/nagazogawugitovilofate.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/3242896696.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/wibisamufijesa.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/197cca1e1545d49069c03f17a9e4d9f2/wazinagidunanefep.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bd3f8ccad---werafuzaten.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/35d2b27f59f798a9623bd62fc17d8db2/88529933366.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/2167073785.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c0e558b93780bbb87b4ddb5cbe3ef96e/58495169683.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=kgf+chapter+2+full+movie+streamingPDF 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_off0001051a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051A 17828 bytes
SHA-256: e07c9d2ae0c66e7cb0e374b8104bd3165c1751e1f1ecb496e5547e0d3a1760a1
font_01_sfnt_off00013345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13345 11204 bytes
SHA-256: 62fe69bf94aa7a674f2acb88dc3fe0afb8f31b69a69451264c6a14512a24f6d3
font_02_sfnt_off00014d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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