Malicious PDF — malware analysis report

Static analysis result for SHA-256 4032f14fe13dca75…

MALICIOUS

PDF

71.7 KB Created: 2020-12-27 16:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1f31f0c4f6fbd3b66d29a8bff3ab5bf7 SHA-1: 63a1f9e561b5015fc4534771ab9811ed0fcaceee SHA-256: 4032f14fe13dca75158890ba179c459a5967147601ff7bf5cda89b772a0af38d
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=archery+bird+hunter+apk'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The ML classifier also flagged this PDF with high confidence, further supporting its malicious nature. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?utm_term=archery+bird+hunter+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4458124/normal_5fb6e08590748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f92063597d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_5fbb2f2718e5f.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/yhhic1o/81347531421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406820/normal_5fb6d93271ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414691/normal_5fd70d6a87bce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446646/normal_5fe6f3fe67405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5fe79878258cd.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://s3.amazonaws.com/bipepezuwed/39451447148.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/lincoln_state_park_indiana_weather.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/luzebelu.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/64384194610.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/rincon_tapatio_spokane_wa_menu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B7 5016 bytes
SHA-256: 3c9204dc079b60036f3922ab25b2cb4f209dba4fb115e4fb13c59c995087bd9e
font_01_sfnt_off0000cab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB6 10612 bytes
SHA-256: 21986fa0e9dfec2bf8cffb71cc930bd0e48b414e9aa1274432a0ddb8ac330e98
font_02_sfnt_off0000ef1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1E 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_03_sfnt_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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