Malicious PDF — malware analysis report

Static analysis result for SHA-256 904430db34ab921c…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 21:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ea516802908c7121e0c89d6754b1f497 SHA-1: ef5f3748c7d20213eee9ddf36f6b7252b44f854d SHA-256: 904430db34ab921c9a1e62fac6a442f7e0e3f2dd7d40e510aff01da549db268d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farm or phishing schemes. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious or deceptive content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/123?utm_term=daily+wisdom+sayings+of+the+prophet+muhammad+pdf+download PDF link annotation
    • http://makamar.tech/el_alquimista_de_paulo_coelho_pelicula_completa_espaolnj3o2.pdfIn PDF document text
    • https://farejebizaf.weebly.com/uploads/1/3/0/8/130815013/xizejikoxir-busuboxis-tubebawoposamu.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/ighiid0/recipe_icing_carrot_cake.pdfIn PDF document text
    • http://nazhivy.net/manual_tube_bender_plans7l4r5.pdfIn PDF document text
    • https://rimozaruminipa.weebly.com/uploads/1/3/5/3/135391391/suwogikumulu_wesaxi_sasadake.pdfIn PDF document text
    • https://cdn.sqhk.co/vigeroti/cMgi5h2/fojat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxime/92720640663.pdfIn PDF document text
    • http://kugunimekuxaf.epizy.com/kulovovitokulafadifidajur.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/cbt_worksheets_for_child_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/korinixebazoba.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/tekixupofamogirazozokoje.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/if_else_angular_2_template.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/water_soluble_vitamins.pdfIn PDF document text
    • http://lolurisufetofel.epizy.com/gateshead_fc_match_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/fozona.pdfIn PDF document text
    • http://vodupuginotipir.rf.gd/mefinoze.pdfIn 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
    • 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_off0000d2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FE 5648 bytes
SHA-256: 7cc73336ea9dde368c6efc45c5706609b21d24f722b3d3f59b77d979ceb9b88c
font_01_sfnt_off0000e631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 11576 bytes
SHA-256: 88686590f045cd8da13c8a4cac81edb607d640b147222258c8d5095313cf6fd8
font_02_sfnt_off00010d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D15 16312 bytes
SHA-256: 89c08bd202ae2ddfb7fea334f0e02c59e53be361ead960ec02e1256786f604fc

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