Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a091cf1b7105b8…

MALICIOUS

PDF

78.2 KB Created: 2021-06-14 20:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: de4257a65b2479c59d30ae5773a3c258 SHA-1: 2152b3148269c7055278c4dad1a005ec1fee9eef SHA-256: 60a091cf1b7105b83602254bf9b8f430064a35b5c0aa6698508956e92e6a73f9
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and links pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to contain metadata rather than user-facing text, reinforcing the interpretation of a non-content-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pistant.ru/uplcv?utm_term=kuami+eugene+ft+shatta+wale+and+samini PDF link annotation
    • http://mosvag.ru/img/lib/file/powivovimos.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/qfbdequ82lm7kvc58fqi61n7oh/15604992140.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/jq39rds0oro8g86i6gqtrkidp5/25253538269.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/17mp6or00mr18ra3kksfgf1ni5/besolojixufe.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/16ad91b6c9cec25a0c2713ebed7f6474/63703882855.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/refkl7qitra7tp6m7ain3lmkbo/72856893139.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160800cdd78b58---32073725489.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/f7dc2d39b26d515a213d074dd7d62687/fitiwofakopozagosa.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/9888c4d2cfa2d4bb14ea707af095b3e5/2721956176.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/850b4031e3ffee2ecb90e2a3150575c1/risopipuwuw.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5381a3cc0---3281090362.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b3380e8ae4c---wizolobukemojugipevana.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f0f330acd---92676649421.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ddfbab4be26924f35d75d0337f8539de/dinifori.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/t4j2c4jm53tj49uj2shi65p5q9/72301338209.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd0e2891b9---86861922170.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095c7865fc86---18958071074.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68A 5284 bytes
SHA-256: bf940e56ced42875908de900d4e8108ceebf5c5e507cd00b5fbba87372cb8cae
font_01_sfnt_off0000f879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 3100 bytes
SHA-256: 8dfbc329322ce60213a0489cc164df76b9f2abbb20cd3cc59ab5d9e8e9bed7ec
font_02_sfnt_off00010534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 11140 bytes
SHA-256: 2cdea2e02c948a11c1d6261d9c8049ec70084a489bb4f29c838ddd846ab732ad

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