Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b9c3d11a335640…

MALICIOUS

PDF

72.2 KB Created: 2021-02-19 11:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f51d21fe912afc76b144a42c6956ed94 SHA-1: e3ef4f96f76d5164dbf91dc25b0ca9ab33039418 SHA-256: 62b9c3d11a335640c9b79a0adfdce6ffc31eb506dde0b95f729b2d812a3b81c4
162 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'ebook pdf free download', suggesting a phishing or social engineering lure. The embedded URL `https://yafferge.ru/strik?utm_term=the+toyota+way+ebook+pdf+free+download` is a strong indicator of malicious intent, likely leading to a further stage of attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/strik?utm_term=the+toyota+way+ebook+pdf+free+download In PDF document text
    • https://cdn.sqhk.co/sejujona/RiiLtpZ/enemy_strike_2_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/ghgjjiX/spinner_io_apk_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/jghia8K/mupudegutiremugosi.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/gnE0qij/transport_tycoon_ios_free_download.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/rirumivi8n2.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/H21hfgf/destiny_s_child_reunion_with_original_members.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/hiigdig/charmeleon_evolution_pixelmon.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/aggDu4i/84078422182.pdfIn PDF document text
    • https://cdn.sqhk.co/vujejanar/jhhgPhi/rabidolivovegudesireb.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/dharHsH/pinball_deluxe_apparatus.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/fasudikek/bozenan.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/baidu_app_store_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/amman_kummi_pattu_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/google_sheets_api_java_example.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/picadura_de_avispa_en_nios.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC5 5296 bytes
SHA-256: 19393cd481a107cdca2990573bfb6780e23517832199586614f8f5ca41f3fee9
font_01_sfnt_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 10836 bytes
SHA-256: dca448cecc9d1453729a62524f0eadd9e774ed5af4ab7cd3ae536e9fcabf7794

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