Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca78f8b055cdeacb…

MALICIOUS

PDF

71.5 KB Created: 2021-02-18 10:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 44c0912f2ad658395e51c22524834787 SHA-1: e4acc3818b2f21b31fc708807e667382da01fe11 SHA-256: ca78f8b055cdeacbe2839bd5f759a692d76c1c0526b4650f9df94a1f27f8d014
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=csi+matrix+algebra+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4428335/normal_601581c547943.pdfIn PDF document text
    • http://fosufupivufup.66ghz.com/blk360_android_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_602ca87590830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457570/normal_5fd98337cbd46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427097/normal_5fc6839c6a23b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_6011f58f90bc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_601ae1e6edb91.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/gudukupir/58564890837.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/wotapasigi.pdfIn PDF document text
    • http://zisafaziga.epizy.com/8025084026.pdfIn PDF document text
    • http://lagorov.rf.gd/67822197034.pdfIn PDF document text
    • http://lesefapor.epizy.com/action_jackson_full_movie_123mkv.pdfIn PDF document text
    • http://wiwawilif.epizy.com/bootstrap_template_design.pdfIn PDF document text
    • http://galupubusimoge.rf.gd/flight_movie_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/banco_bpm_spa_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/naa_autograph_video_songs_free.pdfIn PDF document text
    • http://nofadokar.rf.gd/bibelumafowibowod.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/bevelawaneva.pdfIn PDF document text
    • http://gobavaduxa.epizy.com/gupatilumabesurunoterelif.pdfIn PDF document text
    • http://mafevela.rf.gd/fractions_decimals_and_percentages_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/69506041277.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/28233546511.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_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 5376 bytes
SHA-256: cc63dc5909fd59235c8bf8fea413f4097b7cdbd1bbaf0452608178ee58af90a8
font_01_sfnt_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 10464 bytes
SHA-256: 1787a67a1e17acb90d8471fe57370d114a41fb89c579a53f5e73229d99858a0c

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