Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e2e9591322e14a…

MALICIOUS

PDF

76.7 KB Created: 2021-06-23 04:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 41da18db6cb85fa178eb409cace61693 SHA-1: 224a5b6beb5fc33265dd15c9cbc6eda4e02578cf SHA-256: d8e2e9591322e14ad9ab3f4804e9484a03c7f55998e9f10b147b2cd275bf3235
176 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a 'Macro/content-enable lure' heuristic indicates the document likely instructs the user to enable content, a common tactic for malware droppers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 http://hpworld.hu/data/pic/Image/file/jisozokemebomug.pdf In PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dcd5c878e---1614348506.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/c2d6cdf40c141f286fc259552d6d8477/53255872817.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078f2498b845---fadis.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e02127cf5---lasofojurojajovupodezuxa.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/b2o0l3ukmplle6vp4e206k0f77/jepozenejubowezemi.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/rowodaposisifojawuk.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/35832480442.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607116dc74eca---jisolezibeza.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/952232841b9c54279d3b06c0418842ce/25890878888.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/d1lf1e33vkjlhp714e6mejqbuk/gaxafep.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/6ea51ef793f32898f47c05b9b066b173/54707348472.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/53aaebf40a912ef288e3838414f9c8ae/54644324262.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/60e025fbaf6e3b69617e361356abd8d3/bedego.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/guxavugazilevesuxukonun.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/fagedeg.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/84014180459.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/52254986338.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=tabla+dinamica+excel+2007+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4E 5136 bytes
SHA-256: ed3a0ca4990ed72da4a5e6e75f0de7857e3f8058657a31974e0ce6b42aa23a0e
font_01_sfnt_off0000eeab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 12132 bytes
SHA-256: 2205662d61d60a154d5d559d274f49df6f32af77d0440b063923e363ab47168b
font_02_sfnt_off00011607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11607 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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