Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a576533294f8506…

MALICIOUS

PDF

177.5 KB Created: 2021-03-09 11:19:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: addd999bd3ded6a275847d80ba1198f1 SHA-1: 12ce5d7a5684417ddd6d640f837b8a096423d68f SHA-256: 2a576533294f8506f31e1ebbb475454ab9279df03d2456ea359a5380b31dc04b
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF employs social engineering tactics, including fake invoice/payment lures and requests for sensitive recovery secrets or browser updates. It contains multiple external URIs, with a notable link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to facilitate credential theft or malware installation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9170

Heuristics 8

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://resalured.ru/123?utm_term=spotify+er+windows+github
    • http://fajiriduxir.medianewsonline.com/nj_drivers_license_real_id.pdf
    • https://cdn.sqhk.co/wolitobutak/gWigia3/multiplayer_word_games_ipad.pdf
    • http://mumolazesinidix.getenjoyment.net/sevuwukabafirerotojirixa.pdf
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/7007729.pdf
    • http://jerunuju.mypressonline.com/unication_g5_pager_price.pdf
    • http://rowowevu.mypressonline.com/48690922760.pdf
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/jopozuj.pdf
    • https://cdn.sqhk.co/fakineduxafe/y9EZjdG/anime_avatar_creator_apk.pdf
    • https://cdn.sqhk.co/zubuwebofe/hnO6hh8/xekapetulometegikabibux.pdf
    • http://eushopvmn.site/98070602147i39g3.pdf
    • https://tizusetupo.weebly.com/uploads/1/3/1/6/131607013/5678236.pdf
    • http://ompala.store/karl_marx_communist_manifesto9vnd5.pdf
    • http://desokore.medianewsonline.com/specific_heat_practice_problems_with_answers.pdf
    • http://guitar.su/nuxebojewizomuxefopifi4br91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_c4f1ca3fe35844bb816f5ea82b0f9c9f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/be6deb5c-2267-40dc-be60-d2330e7cb3bb/what_is_the_most_popular_axe_body_spray_scent.pdf
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_39bbe045fdab401f8936dbc507748c5b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/692ab12f-e916-45e4-aa01-bb2aa81842ab/game_of_life_online_free_unblocked.pdf
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_d03846c49b284fbfad1d4c481410ccfd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6021e17e-c9f2-4bfa-8217-d392d36cb537/symbol_scanner_programming_sheet_cs3070.pdf
    • https://3c8d80e7-2998-4b53-b1db-ea2053e4eee2.filesusr.com/ugd/5c8c55_3643a3d82c2a4e06824054cf7685a27c.pdf?index=true
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_65cec2518c324116aa99c8416f964713.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f291d363-9bb5-4e76-a55e-961a9847d675/geziwiwikupapa.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022c8f.bin
00df5d20f56b219338f23bf11f738b2cef91a48bffb73f08ee97c4d85de4404a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22C8F 5484 bytes
font_01_sfnt_off00023f75.bin
f32335e5186801630726392a5629f1dfef9c1e1cbe31ab5f7a45ef8e3a7734cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F75 5380 bytes
font_02_sfnt_off000251c1.bin
3e739a1e5999b56eea881657ad70ccd2950011a0099dc8f748b226ff10d725cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x251C1 6192 bytes
font_03_sfnt_off00026735.bin
7111163a2d217b596ec4710f2981f698d46e63ac908b76529321451f77d4bf4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26735 14308 bytes
font_04_sfnt_off00029326.bin
d612c605d101522a7b082cd092ef78b209dae850c4a5e940dd0f53fb1bc5669f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29326 16148 bytes
font_05_sfnt_off0002a836.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A836 4324 bytes

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