Malicious PDF — malware analysis report

Static analysis result for SHA-256 447ed8f55df8c435…

MALICIOUS

PDF

108.9 KB Created: 2021-06-17 05:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7291a1d39be7fdd9583fd89c0333f48a SHA-1: a6ab4f24fc0566e6da89f55fa05f82d41d1a8f8f SHA-256: 447ed8f55df8c4359c79f1c78fa6c49406da653008823a1b49925dc3531e14e6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

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://oniceh.ru/uplcv?utm_term=spark+in+action+2nd+edition+pdf PDF link annotation
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/02f8b78002255dd45c9586ecf0a21906/61958710160.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/ufoe1i50vhvfrabde86rf2iv1n/28153598698.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/zazemolofenagifuxikasiw.pdfIn PDF document text
    • http://ekotronic.eu/files/file/793659879.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ol6bpl0r5mn4vs7s0g2sa1si2f/83056824142.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858887994aa---fezejapivegipewokaduboza.pdfIn PDF document text
    • http://cecev.com/stockages/files/18763356377.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/njoiuh3g3s2355934mq8mgb9t1/dosaguzamix.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/ghkg52l1ueup65h431oju047o4/mafarekomubalovipopilomok.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/91740790060.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/jozafos.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160709b8ce6961---33079492445.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c916b29c210---savawerepamo.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160719c3cca2b7---99804989597.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/98972571261.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fc0480740---69327130050.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e09632b7df---goduworetapegabafizami.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_off0000f7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E2 38164 bytes
SHA-256: b0e41ab3b3418cc8be9bf4481a19273bd23e3af127aff213f712b0c585b61374
font_01_sfnt_off00016d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D50 5240 bytes
SHA-256: 2ebcb414167e9a3b7b6c5e365abd3cc960bcbd6857c910cce4979a1693bd0b55
font_02_sfnt_off00017f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F39 11464 bytes
SHA-256: 1e24596763d8b0639a25c452312de5633da13a0cf311567519ec322d32a42a40

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