Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40099374b13c788…

MALICIOUS

PDF

77.7 KB Created: 2021-02-23 15:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9ffe60a95ce6f6f136a553b9d0c02042 SHA-1: 65ab852584e2e0f1736dbe61ceed0d768acc24a6 SHA-256: c40099374b13c788a400471b7d98b468378233d039018d9f37401693b65dfc51
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that points to a suspicious domain, likely intended to phish or deliver a payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=tipos%20de%20comunicacion%20intrapersonal%20interpersonal%20grupal%20y%20masiva PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483837/normal_600dd313e48d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_6024258909c42.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/wifiduxezo/corporate_board_of_directors_resolution_form.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/jacques_derrida.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/67592130920.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/commutative_associative_and_distributive_laws.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/susalinirosu.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/atomic_bombing_of_japan_source_analysis_answers.pdfIn PDF document text
    • http://lovenewaw.rf.gd/83592598963.pdfIn PDF document text
    • http://kozitoxezafovi.rf.gd/70308002787.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/nightingale_yanni_violin_sheet_music.pdfIn PDF document text
    • http://rixuzomobe.epizy.com/71689209840.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/54597446671.pdfIn PDF document text
    • http://miwuzira.epizy.com/samarasimha_reddy_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/jibafewomesaxejama.pdfIn PDF document text
    • http://koxoxitukemanaj.epizy.com/wemokow.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/65324976906.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/aws_rds_aurora_cloudformation.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/gana_sudhakar_album_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/browser_based_fps_games_no.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/82666186775.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/bootstrap_form_input_align_right.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 5504 bytes
SHA-256: 63f2aa11b12d5c1ca26a917aa05f52ab3bec2fe61898975b435518948bbdc131
font_01_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 11324 bytes
SHA-256: 26830f8e29bda37407036822ae0e87bfd08b3adab4b28c9f6475722910740113

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