Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dac4b906616bc9…

MALICIOUS

PDF

73.0 KB Created: 2021-02-13 15:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1c09a44a758720147dc967800dd909c4 SHA-1: cca09b538636e84871067fb486796f00f2c178aa SHA-256: 08dac4b906616bc9e9ae2a6dd78cd52e233562dd70cd924731cb23d4e94444cf
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=on+the+map+word+whizzle+answers PDF link annotation
    • https://bufezemaz.weebly.com/uploads/1/3/4/7/134714495/kuwakitaloru-fuxin-zaxanufuzo-wozuk.pdfIn PDF document text
    • https://fanamixaxa.weebly.com/uploads/1/3/4/0/134017579/a3e830741.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379241/normal_5ff3f73666cff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_601385d57b250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372721/normal_5ffe18ece9138.pdfIn PDF document text
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/74d64536ceeb057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_60164ec27b1d8.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/uc_browser_free_apple.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/tubupejevomo/69476883012.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/41289986479.pdfIn PDF document text
    • http://rivapuremamoge.epizy.com/87426559292.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/minmatar_epic_arc_guide.pdfIn PDF document text
    • http://jawuguv.epizy.com/zemana_antimalware_portable_free.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/barcos_que_vuelan_imprimir_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/97487578431.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/xedevuzata.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/webcam_video_chat_app.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/travel_guides_tv_show_aus.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/pakiwesinisa.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_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 5368 bytes
SHA-256: ec119e650f3dd64256c9c9728d839678c8de4272b6d05a060015614a8e26df5c
font_01_sfnt_off0000f3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D4 10600 bytes
SHA-256: 945b4b58f57e58b06bdb3d6808c0ed692ef0821522d32a4cecb9194668626473