Malicious PDF — malware analysis report

Static analysis result for SHA-256 67666628a0e9797d…

MALICIOUS

PDF

75.7 KB Created: 2021-05-24 02:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf990cc8690666e903393cfae2fb64f7 SHA-1: b2040ea67558f370397336486f3ab8cd33834f14 SHA-256: 67666628a0e9797dbed5f0417abcb1e34bc715c427fda0ce92e27ff2d8ed0ce8
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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
  • 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://crophysi.ru/strik?utm_term=the+little+rascals+1994+movie+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379982/normal_603aae47b5bf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371498/normal_5fde0d49ca2da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470543/normal_5ff97726619a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483337/normal_600752898e135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463264/normal_6059f657ac660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445745/normal_6027310000259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_601624a8430e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454673/normal_60204aedcbd9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1cf27c3-6db6-44da-9f1f-1ab98099801e/dark_souls_2_save_editor_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9b3bc6-0362-4916-97ed-cfede5db288d/44313445452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3248c66d-3467-43cb-9e84-4d73960f469e/xapuneruzefejubuguse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6307edb-1c1b-41c8-9a5c-d74ce252304d/complementary_supplementary_and_vertical_angles_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9554525-bd1f-4fad-aa91-966f9a0c5b5d/is_netgear_n150_wireless_router_compatible_with_comcast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e8c41b-e238-42f2-8218-54375e80668d/how_do_i_connect_my_ihip_headphones_to_my_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/shure_ulxp4_wireless_microphone.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/maquina_singer_3116_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/969b9518-4e28-4096-ae09-e06a0f12c647/how_the_brain_controls_body_temperature.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_off0000ea92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA92 5660 bytes
SHA-256: dedd5b83970297673756bd3b27739efa39bab23a50cb92d33f89d2d23a045a55
font_01_sfnt_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 10596 bytes
SHA-256: e492a814ca57a8ee63fd7f783c149504277482ca2b7c6e3ed0b3e0a0fba040fc

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