Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48447c899dce1a4…

MALICIOUS

PDF

70.3 KB Created: 2021-02-28 11:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 994e658c352c425b91c5411050ec768b SHA-1: 4e929488ce94a36aeeecad13ae91c630b5921a4b SHA-256: a48447c899dce1a4ed10b9eaf713164fde407f0fcb8556d0dde2ebfd4e25c7fd
196 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
  • 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://jacksth.ru/award?keyword=what+do+you+do+when+your+keurig+says+descale PDF link annotation
    • http://weraka.online/how_to_know_if_someone_likes_you_by_body_language64ero.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/ihHLii4/54472642353.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/how_do_i_fix_my_e18_bosch_washing_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/qJYixid/72735389339.pdfIn PDF document text
    • http://pinopizo.sportsontheweb.net/59960338535.pdfIn PDF document text
    • https://mivagadak.weebly.com/uploads/1/3/4/5/134599435/ca3a980.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/hjndN35/translate_romanian_to_english_speaking.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/retobifulipo/describe_yourself_interview_answer_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/hello_hello_elton_john_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/infomercial_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/bootstrap_verify_email_template.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/snowy_owl_aarakocra.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/rugami.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/free_powerpoint_jeopardy_template.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_off0000d703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD703 5472 bytes
SHA-256: 6649b47a9d7ed9800e389fc1f76b3d625a0ac7203c6b176fa90d55810b05706c
font_01_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 10148 bytes
SHA-256: d439d5b166aefd05433d754437887a3bff320034e48068420606390ac677dc0c