Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0ba1f810ae06b3…

MALICIOUS

PDF

82.0 KB Created: 2021-09-04 22:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f1ea674711550c63158cb72ef26a1d73 SHA-1: a9bb87c54e795059ed189ae19cee019e8653412d SHA-256: 2d0ba1f810ae06b350db17803e7ff14b09628c975eda5b03c4a3ecc70efb4324
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The presence of numerous URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607625e7e42bf---pusagevosozawuf.pdf In PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/25f490c13da1b6b9ccf18cc9930d3d8f/5528759173.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/72108582518.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210904_38C62DA35069D6A8.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/malakixekogu.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/xogasad.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/5dc2405fd6fc3d7a3b9f6d698dd519a1/tapirojasodiruruwel.pdfIn PDF document text
    • https://epiphanych.com/images/file/pijowutasufovux.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a24699e237b---90778962155.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/72960625651.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/cc429660b59b06d7d219a14c442a6887/24236507159.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d478dc029a---sowomediponusadizofuwevu.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b80cc66e1---beperi.pdfIn PDF document text
    • http://ahoba85.com/clients/2/26/26d353b61ac95a99d7df5001a3d58300/File/sasilekulo.pdfIn PDF document text
    • http://debden.org/userfiles/file/67804447457.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/29228031596.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133031d1ddbf---62823511454.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/64866721109.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/11302458113.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/zenet.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/54f7320d8154f305872e4e959efdbd18/tuzezizipamivebojuwuweze.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/21453876728.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210725_60C875C0E59AE9DC.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/a43c656624093eb955a376c2b8350651/69635041008.pdfIn PDF document text
    • http://mobiliteit.nu/files/ximokiwatamuxugigimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=el+camino+de+sherlock+pdf+capitulo+2PDF 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_off0000d51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 11180 bytes
SHA-256: a9a682b52b7305d4516e8699e30e6eb7ca64391a1346130257276cdc03b14d1c
font_02_sfnt_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 19336 bytes
SHA-256: ed986997c03a596faf4998750f0760c8adcc7d46c7cdc24089a9eb72c73f32ce

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