Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8e4a5022305e15…

MALICIOUS

PDF

78.9 KB Created: 2021-06-09 22:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae383fd4f82097d5ffea8fd06a78dd1 SHA-1: 6d25f3f6812fbf87f4204fcd04b98cc4d8135ebe SHA-256: 2c8e4a5022305e1508b2df06855d557a561e3dea05f9f086d2962429d2978c6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a tracking mechanism often used in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://chcial.ru/uplcv?utm_term=white+knight+narcissist
    • http://aaaexpressheating.com/userfiles/file/mikamereveviturogaxi.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c184c90215---bupupido.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210530212800.pdf
    • http://praconsulgroup.ru/pict/file/81310391783.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/d516d08bb77348e5fac8e16da062dd77/pomigewurijojosowo.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/7j36brj9d4p8b8el7qkfhk0np3/83829981318.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031ef1db29---62284730661.pdf
    • https://deltagroup.bg/uploads/file/zodefogugagorujasuj.pdf
    • http://uniquecharacters.com/upload/files/42104715419.pdf
    • http://shs1977reunion.com/clients/41590/File/85947153230.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b916d669a3---nusunifokewaf.pdf
    • http://technology-mp.it/userfiles/files/xomojixulexu.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939f6e6b3e5---94194516079.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/4faa4f9c55854a0921f4f830d76b6d5c/58777777689.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/132ae4f388f42be23adb921d807ec3ec/47083055437.pdf
    • http://ya-ke.cn/admin/upload/36430732651.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd2.bin
722499ead1f9cc9c82b0fdf695638ea138262b4b70e07ffe4a7817e7353f6962		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD2 4784 bytes
font_01_sfnt_off0000fc09.bin
04b6330bcf0a0bfa6304651ea553b991cc2020b0b982c2109c8d2400012be2f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC09 10716 bytes
font_02_sfnt_off00012061.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12061 4324 bytes

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