Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ce0263bcc370fd…

MALICIOUS

PDF

81.8 KB Created: 2021-01-27 14:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: af365c573da8aa90337483d09466b7eb SHA-1: 0cb66e2f37d568626f1167bd48617ede3e4566e7 SHA-256: b2ce0263bcc370fd29ba2dfdb85c43055c4a9f2e5c5cf704e8dd0592d4b0713c
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/wb?keyword=strung%20along%20example%20sentence In PDF document text
    • https://cdn.sqhk.co/sepokafaru/ijxjaTZ/merge_dragons_wonder_6.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/h8Hwyhe/i_remember_you_guitar_chords_adventure_time.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/gfggohh/79547580398.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/hdjfhN0/sausage_run_silver_games.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/hidijt7/disassembly_3d_full_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/ROQhXf6/o2_international_sim_top_up.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/difjagc/janamoloruk.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/watujek_tikeroz.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/pKiigdw/27130899593.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/NOw78gd/survival_island_2_stage_1_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/gshdmgc/anti_aircraft_fire_3_3.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/nJjhIMv/gedebefi.pdfIn PDF document text
    • https://cdn.sqhk.co/pexejaxer/W8AAIjd/27744056414.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/jaiaWVG/amazing_facts_about_earth_crust.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/agifFjb/darkovibes_wish_me_luck_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000103af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AF 5424 bytes
SHA-256: 1521014c115ca42a144593c872cb4c01f74585cdb2cbfd5e1f94be9401a47dc3
font_01_sfnt_off00011610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11610 10900 bytes
SHA-256: 1855942b287722226f43f7afa1a8c9629bdb5be28993908cf80ac82c2971f999