Malicious PDF — malware analysis report

Static analysis result for SHA-256 407fd4b1d6162c13…

MALICIOUS

PDF

72.6 KB Created: 2021-02-17 02:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 97c8eaf8da141149f307530188d3c2d2 SHA-1: 1027df2bcbf2270a652e1df91b52708fa9cf8f7d SHA-256: 407fd4b1d6162c135d3bd0b58d67aaa7965698ca16ca7bb30db5bfdf680df7ea
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://bologen.ru/wb?keyword=this%20book%20loves%20you%20quotes PDF link annotation
    • https://fakilopatezi.weebly.com/uploads/1/3/1/6/131606638/7512874.pdfIn PDF document text
    • http://teaapple.space/93634463778rx86s.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/how_many_spell_slots_does_a_wizard_have_at_level_5cpil9.pdfIn PDF document text
    • http://remont-pc.website/mepegavajiqhs3g.pdfIn PDF document text
    • http://podeves.xyz/unknown_battleground_fire_apku4uev.pdfIn PDF document text
    • http://interstart.online/telugu_private_love_ringtones_download_20202mwp6.pdfIn PDF document text
    • http://endi-itali.space/46184942611jmkcx.pdfIn PDF document text
    • https://ravaruxotono.weebly.com/uploads/1/3/6/0/136087447/f844c.pdfIn PDF document text
    • http://spoonnumberone.xyz/vazepuvepovuwosufezqgeh6.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/company_introduction_template_freegxo3h.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/wotodedaruzuk/james_hardie_fibre_cement_sheet_sizes.pdfIn PDF document text
    • http://banafosas.epizy.com/48208360479.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/autocad_2015_floor_plan_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/holt_ohio_algebra_2_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/maa_bhoomi_app.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_off0000e171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE171 4908 bytes
SHA-256: b4b820342bc62d705a830dd46b5fd87603312768b1b758ceef4b21a58f90fbd8
font_01_sfnt_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 10392 bytes
SHA-256: 39a4f294be9b5181d96ffeac7964ba359e3db5cd5ba5eb2ca16d7a9a837c5ac0