Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3f0f4a75e1c592…

MALICIOUS

PDF

79.9 KB Created: 2021-03-16 20:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8fc7bc73d62457d5e2255cf07dc48812 SHA-1: 45cc0e728a4f632a1490bcb519c32705c78ce0ef SHA-256: ab3f0f4a75e1c59228597b0f6535c592ce6369e37cfdf121c0eb5ae69df8ec29
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=the+witches+book+pdf PDF link annotation
    • http://fulukegoror.getenjoyment.net/2020_calendar_with_holidays_south_africa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501634/normal_602ab9b2d38d4.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/86006685465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415929/normal_605055d3e2976.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384472/normal_5ff6d34e0b5a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481166/normal_6008e66ea4006.pdfIn PDF document text
    • http://nefufovej.22web.org/winegard_travler_setup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_601807f08480b.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/mejobu/flight_radar_24_pro_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/adeptus_custodes_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/tufoxozowugixovukipesowe.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/black_semi_formal_jumpsuit.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/creditors_for_expenses_in_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/41478243527.pdfIn PDF document text
    • http://xejobutek.onlinewebshop.net/chromosomal_abnormalities_book.pdfIn PDF document text
    • http://jisixapuwalim.epizy.com/2400266821.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/77439306460.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/what_is_ethos_in_rhetorical_device.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFF 4832 bytes
SHA-256: 98e9cf25475789874a1f9272d8975dc12c63489a59d11f0e4f7c75288658ce11
font_01_sfnt_off0000ff87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF87 10920 bytes
SHA-256: 0369ac5602e7b47be0abf34549260fe2f55aa0992ea0b0b245644250cf169097
font_02_sfnt_off00012492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12492 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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