Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ee749fd92bbcdf…

MALICIOUS

PDF

67.0 KB Created: 2020-11-30 16:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07143775afe6e63f1a449079ed505198 SHA-1: d174d57459c264b0b3924aab50c08135e8af51ad SHA-256: 18ee749fd92bbcdf1fae03c40d4ddc59516997f510a41c75166aab334bbf14f0
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains references to 'Ares virus mod apk', suggesting a lure to download malicious software. An external URI was also extracted, pointing to a suspicious domain that likely hosts the malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=ares+virus+mod+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd131cb24ece27e9131bcd/1606226719690/legageduwolawumojovi.pdf
    • https://static1.squarespace.com/static/5fbfd18111f6a419847f67ca/t/5fc20528145a8629dcf73e9d/1606550834086/introduction_to_academic_writing_level_2.pdf
    • https://s3.amazonaws.com/bofake/portable_solar_panels_harbor_freight.pdf
    • https://static1.squarespace.com/static/5fbfdc47a13a450babee0d2c/t/5fc390fe18e72e5fdb45f9aa/1606652158348/to_kill_a_mockingbird_poem_about_scout.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49f0eaf37e3b6491e4ae/1606371824837/what_is_a_bank_letter_of_instruction.pdf
    • https://static1.squarespace.com/static/5fbffe61bf71053ccb0b2b06/t/5fc0dd6b9ee0f32b8772c522/1606475115706/fix_up_boy_problems_lyrics.pdf
    • https://static1.squarespace.com/static/5fc0d4a28139af037644e7e6/t/5fc1c79108845d0924cc3a64/1606535072733/mupawaresomonaxikowasebaj.pdf
    • https://s3.amazonaws.com/midaguvimabof/sword_art_online_english_dubbed_gogoanime.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48cea97599144eed5c59/1606371535016/guwavola.pdf
    • https://static1.squarespace.com/static/5fc0e3ecc14dfd36fef16b99/t/5fc2fa971972c46e3c00a876/1606613656353/lego_saturn_v_launch_tower_vonado.pdf
    • https://static1.squarespace.com/static/5fc1ae84085bf90c0e029602/t/5fc433baf8cdb769c668b09d/1606693819650/go_math_grade_7_page_144_answers.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0b04b7ee8e7075a044b2/1606224645664/glorious_bj_putnam_chords.pdf
    • https://static1.squarespace.com/static/5fbffb1ae9fc3622d51d09b9/t/5fc4b1d6a97599144e8d4321/1606726107034/tiny_tunes_apk_1.16.1.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca6d.bin
e7005fd6183790e277711ebd5ad506f68ca52b7e84bc044472cdad340cb7097d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6D 5188 bytes
font_01_sfnt_off0000dc00.bin
99bec8bb1af34fe6787f2c591d43c1c9a38b5bf1851d955304de11a020e80d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 10464 bytes

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