Malicious PDF — malware analysis report

Static analysis result for SHA-256 844aa368f971b327…

MALICIOUS

PDF

93.8 KB Created: 2021-03-28 23:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82592b7fc96c38e7b5f226553bcdd55e SHA-1: 517103580aeb23de8b91c3b8c22808b8487bc173 SHA-256: 844aa368f971b3270d3d0763b965d71db8ea02c4809fdcfc6dd1e48d30714a01
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of an external URI pointing to a suspicious domain, combined with heuristic findings related to urgency lures, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=how+to+hack+critical+ops+with+lucky+patcher
    • http://sufagifem.22web.org/start_up_bakery_business_plan.pdf
    • http://tobaliwono.mygamesonline.org/victoria_bc_street_map.pdf
    • http://my-favshoph.online/4196827058b7i84.pdf
    • http://bimonetejatoleb.mygamesonline.org/classifying_real_numbers_worksheet.pdf
    • http://conicppjry.bid/loluvutumeroj81nw1.pdf
    • http://golden-bridge.pro/applied_machine_learning_in_python_coursera_github_quiz4pfbt.pdf
    • https://zapowiwowo.weebly.com/uploads/1/3/0/7/130776131/c61d675f3025.pdf
    • http://wozekozexufoxol.scienceontheweb.net/what_is_diploma_in_supply_chain_management.pdf
    • http://copyrightsafetyhelps.com/tosezowufidaroretururu0auhj.pdf
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/xaponotavisagemow.pdf
    • https://ravojinukof.weebly.com/uploads/1/3/4/4/134476618/jezitesiwofafidi.pdf
    • http://wipunemobak.mygamesonline.org/aedes_aegypti_y_albopictus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/26e28e24-a1db-4dc6-aa7b-a1cf2f386e51/rifodojoferezide.pdf
    • https://uploads.strikinglycdn.com/files/53b33536-a10f-464c-88df-784be172c971/79519586554.pdf
    • http://patenat.epizy.com/making_lasagna_sheets.pdf
    • https://s3.amazonaws.com/pizexopenaxu/59701968371.pdf
    • https://s3.amazonaws.com/zuguvoxoki/casterton_school_uniform.pdf
    • https://uploads.strikinglycdn.com/files/56d6c13b-888a-4fbe-bae2-632fb650dc32/78880415675.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c4.bin
ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 6744 bytes
font_01_sfnt_off0000faac.bin
b629c072989af9292c698bb02d5e328d2e5fd2b7f2c18986b4b065ecc32cd336		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 5240 bytes
font_02_sfnt_off00010c84.bin
c58af526a6eaad9b0441536f316c66b747f99e53ebac7f909242265cf62c787a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C84 6256 bytes
font_03_sfnt_off00011fdd.bin
284ecb7fac37ef8daf88c789896a26c1ea1bcec348fc1240701db8a55814831d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 15560 bytes
font_04_sfnt_off00014f52.bin
1b8aab85b4894a316a5fb52f21b4235677116ba661cb5283b434d32fc8145a13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F52 16904 bytes

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