Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4316bc5197c707…

MALICIOUS

PDF

72.8 KB Created: 2021-02-18 00:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5bc30a5c8a4179c8f0f5698fddc74baf SHA-1: e60b21f71e22382ed01584da99196cf60dc8febb SHA-256: 7f4316bc5197c707c4852b0d3623b3c9d6490dfa246ccf075a7788459b61e9aa
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a social engineering lure related to origami. The presence of a malicious link and the ML classifier output strongly indicate a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://yafferge.ru/123?utm_term=how+to+make+a+origami+heart+bookmark In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417834/normal_60215994a1c4a.pdfIn PDF document text
    • http://yourcy.com/jaws_theme_sheet_musicybe4t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_5fe82df9635a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487647/normal_5fd059bad3bb4.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/UAGpTfK/highwaymen_netflix_imdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_602bf5efdba52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409827/normal_602b60d9a905b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445119/normal_5fe05f6cd53bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446027/normal_6009ad7c4f1fb.pdfIn PDF document text
    • http://reduslim-officialsite.site/sample_letter_of_intent_word_template0x1vy.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/3IicjiL/drum_set_price_amazon.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/sabobenuwe/38884919334.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/textos_argumentativos_definicion.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_off0000dea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA6 5148 bytes
SHA-256: 9f3c351e6d9c909ec5c46573c643761330837e37bfab7c08bc4e7f9b203cb8c4
font_01_sfnt_off0000f00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00F 11228 bytes
SHA-256: e7535a56de56597fe0612163b272975ac35dab600a3d20f6f8a04110f865e008

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