Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07450809723f66c…

MALICIOUS

PDF

103.2 KB Created: 2021-02-04 09:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 04e414b1a17c7dd2f6438ee8be1a05e6 SHA-1: 5d963ad05e633b99f2638bf4f5ef9deeb97bae3b SHA-256: f07450809723f66cf21cd945851397458653ba95242c5d26069a77d300f0bc8f
162 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. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=febrile+seizure+guidelines+2017 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_60168a8bc31e5.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/92oG4Bd/winenatupufobiz.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/2lteEQt/motogp_racing_20.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/aBZ5Xhh/universal_religion_definition_ap_world_history.pdfIn PDF document text
    • https://cdn.sqhk.co/kukojuvata/y9gejd7/the_solar_system_names.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxikinanibu/ij8gfhe/auto_clicker_for_mac_that_works_on_roblox.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/becCR6z/64183737902.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/ZPhawic/nuzawawivelijoketu.pdfIn PDF document text
    • https://cdn.sqhk.co/nekuripafi/Dhd4ggy/22538481481.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://segudufarus.epizy.com/sebalu.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/37003680446.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/screen_capture_video_windows_free.pdfIn PDF document text
    • http://xirixoxixewop.epizy.com/acrylic_sheet_cut_to_size_singapore.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_off00015655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15655 5332 bytes
SHA-256: 3342076aa9bb4b51237c63d1ab9e615382fb0d051a2381e92b1c8af2ee702ad7
font_01_sfnt_off0001689c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1689C 11728 bytes
SHA-256: dfdcb8c1641f32ad420732e83dbebac3d991f34783de0952873139eddcd65c17

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