Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb64a8d75a33206f…

MALICIOUS

PDF

70.3 KB Created: 2020-11-23 19:39:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d4a74bb36c3f31feedab41952cc56125 SHA-1: 5e9bd7f167f2ce10470024bc5c848ab740d8ef0a SHA-256: fb64a8d75a33206f6dbc624e0e594977cd86f401f5832b84390c1d02c2743c3a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/wb?keyword=mergers%20and%20inquisitions%20interview%20guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fb93cf83b838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416510/normal_5f9a4814f2fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446651/normal_5fb94dceab8e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f875248d50ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_5fa1bfdd813b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f92ca3076690.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/e03e6ba0-8bd0-4261-ba8c-66da35175ea1/rumigefikuxabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0406f29-4525-4e7a-9f96-d3110a2caf1a/anydesk_latest_version_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc96908-bdf6-4cb9-b2d8-7fb6eda7550f/whirlpool_cabrio_washer_error_code_f51.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac67f2e1-d714-490f-be47-26950b682dfc/fly_me_to_the_moon_bass_tab_guitar_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59635663-7c9e-464c-b3d0-78413d3b63b8/98833027393.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/ayyappa_bajana_songs_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd2259c-e873-4ef2-9b85-a3910832d91a/84327322460.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/56794464865.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_off0000d674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD674 5244 bytes
SHA-256: 1a6b84adda967f642355fa028b067252296ce4b9f64638eefaef59cbe084e21d
font_01_sfnt_off0000e870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE870 10672 bytes
SHA-256: 0e5732a93de48253abf85c28ac4f709604498c1dff816d7452744c07791e4c5c