Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45d43bb6ca39dde…

MALICIOUS

PDF

99.5 KB Created: 2021-04-07 19:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ce58ca3e7adaced40f4543571ed6a93 SHA-1: 4b6ab62382894673b03d4a0291a560f3b3650949 SHA-256: d45d43bb6ca39ddef818e866e2475e6f5c3cfa56f82f8d68ae5b503ad8d87495
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous external URLs pointing to potentially malicious content. The presence of urgency and password-protected archive lures suggests an attempt to trick the user into downloading and opening a malicious payload. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 8

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/strik?utm_term=present+perfect+exercises+pdf+with+answers+esl+library
    • http://mavpa.fun/gomarudufimivegirubisifyoj9.pdf
    • https://cdn.sqhk.co/takodabu/3WGN6ZV/animal_farm_movie_watch_online_free.pdf
    • https://cdn.sqhk.co/sixitigoxeto/jib7Mgf/breda_academy_uniform.pdf
    • http://romeital.space/dual_boot_windows_android_x8612m10.pdf
    • https://cdn.sqhk.co/duvapegoleva/DicicYj/38448388539.pdf
    • https://cdn.sqhk.co/girolivudafo/kxihFgj/pegexosuzipamif.pdf
    • https://cdn.sqhk.co/xunixenovapi/VahftIi/11411304664.pdf
    • http://jixewelo.scienceontheweb.net/who_owns_wpt.pdf
    • https://cdn.sqhk.co/daposofoxig/hgjjjhg/96843575197.pdf
    • https://cdn.sqhk.co/nojebimit/Bha14gf/bolarezedinorigalesokoj.pdf
    • http://24goodstore.site/sabimowutyzoy.pdf
    • https://cdn.sqhk.co/gesafafo/jchjE5y/dreamette_ice_cream_middleburg_florida.pdf
    • http://dafesoxexigu.medianewsonline.com/9387604814.pdf
    • https://cdn.sqhk.co/bopibege/vbUlhd1/gods_of_rome_gameplay_pc.pdf
    • http://opros.xyz/lost_in_time_crochet_patterns55ra.pdf
    • http://topukovatawosu.sportsontheweb.net/50718991392.pdf
    • https://cdn.sqhk.co/pobopuwubox/7IjfZhd/27814354748.pdf
    • http://muzoc.xyz/polejuzajikesusofinibv1zh.pdf
    • http://lnstagram-badge-verification.com/joola_ping_pong_table_touch_up_painthmi9c.pdf
    • http://obuv-kozha.ru/sharp_split_ac_remote_control_manual2g1uc.pdf
    • http://graatorama.fun/piwedabefavozupineromada679z.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_ebd1fe63003345d5bf350dac1dfd092c.pdf?index=true
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_7b4859e7e2c14a1a97f015d5bcd8591c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000144ba.bin
df1742040b1a9da9347ccb65f54d357d4a69db1efe1e0438044cdc958705abae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144BA 5644 bytes
font_01_sfnt_off000157fe.bin
92174dbb974bd905dabf0549846556c68e772b036e7f3b7a547f8c23e76ab485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157FE 12004 bytes

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