Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba3a33b42ba18ab…

MALICIOUS

PDF

66.7 KB Created: 2021-02-02 21:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7a816636a9fb4e8ce2e99376ba236fe4 SHA-1: e20403a2646f66315b8e75c96fd7bb9f1f9660d6 SHA-256: 4ba3a33b42ba18ab92048bfcfedbdfdc7d36cc1c6107f8a82899705a718df426
136 Risk Score

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/wb?keyword=factoring%20basic%20trinomials%20worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388067/normal_60110afb3f781.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/veveduwili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_601636b42fbf2.pdfIn PDF document text
    • http://vudujupuboneg.22web.org/burnout_syndrome.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5ff666aa7e634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394082/normal_5febc230dc39b.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/buponuwebi/crb_online_disclosure_guide_e-_bulk.pdfIn PDF document text
    • http://tiliken.rf.gd/blazing_sniper_cheats.pdfIn PDF document text
    • http://kapetevik.epizy.com/31149597874.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/t._e._a._m_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/36692599999.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/head_injury_guidelines_football.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/indiana_jones_fate_of_atlantis_remake.pdfIn PDF document text
    • http://vudexejuvejutek.rf.gd/chrysler_pacifica_2004_repair_manual.pdfIn PDF document text
    • http://vupifokixen.rf.gd/velop.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_off0000c7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E8 5464 bytes
SHA-256: 9d57482b2c2aa93fa7a9f3d4d1b3610381b0d240ac8c7e2bf5a11bf2d747379d
font_01_sfnt_off0000da68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA68 10416 bytes
SHA-256: 66f83028442a34a580a48ca7d2f665932f76b744162df816a944846cc97e2ed2