Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa8313cedf77c0a…

MALICIOUS

PDF

75.3 KB Created: 2020-12-19 22:27:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a0e182c8fba337483f804159430db7a5 SHA-1: ea6291588492aa926ede717b6d72a4e16bc7527c SHA-256: dfa8313cedf77c0a691b7433d2a22b09ea5d2062b1edf33200cd990341e35160
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://traffset.ru/123?utm_term=wifi+tether+router+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5fd61e32b89aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_5fd28946b4559.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455381/normal_5fc8bedacbf73.pdfIn PDF document text
    • https://dexekuweda.weebly.com/uploads/1/3/4/7/134705305/towibovafup_minejilaxulovon_nafawev_rojizakere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409257/normal_5fb3623bcd2c2.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/1c0d2ce2-7ce1-46c1-945d-3e69c94adba1/vezesas.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/apache_cassandra.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/49294409665.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/foxtel_now_app_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/bootstrap_gallery_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac295d0-46b3-4636-b812-630b0e1a0513/gemotepu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/45439309761.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/folie_a_deux_fall_out_boy_lyrics.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AC 5120 bytes
SHA-256: 803a544afc736bf6f326e1fa8bf0e5daeba7d956f8a5886cc815c0d71b292380
font_01_sfnt_off0000e22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 11848 bytes
SHA-256: e1d9670e80158c7cb73d76aa24b055edef3e6a66ab26fa5bd40c5975ff79e60c
font_02_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 16660 bytes
SHA-256: 20f912b6932addfa27ab6a24080b7b74380abf367cf774223465ee8118a36e48

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