Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f99830220895b8…

MALICIOUS

PDF

79.8 KB Created: 2021-03-22 02:11:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54c4d082f09634695ad7e3f2460de7a4 SHA-1: 6d00d459aae031348c6e5c320daa81670ada6192 SHA-256: 35f99830220895b865f84898bc841530ac6833b04ac6f5ab69d50ca2936edef3
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated content and an embedded URL that points to a resource disguised as a manual. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of an external URI suggests an attempt to redirect the user to a malicious site.

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://ponafet.ru/wix?keyword=mosby%2527s+manual+of+diagnostic+and+laboratory+tests+6th+edition+pdf+free
    • http://pigigozoruda.mypressonline.com/mixarovi.pdf
    • http://nanutoz.22web.org/free_life_skills_activities_for_adults_with_mental_illness.pdf
    • http://rejamar.sportsontheweb.net/jarazot.pdf
    • http://tifusavegapawuf.mygamesonline.org/goziliv.pdf
    • http://bisibometixo.mywebcommunity.org/pathogenesis_of_cerebral_malaria.pdf
    • http://verification-help.business/rulefewogifavaa3nno.pdf
    • http://mon-compte-cmb.best/guitar_strumming_patterns_bookug4em.pdf
    • http://1xbet-football.fun/varatewijajuvojibewerewkzkm9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_f2259e5618a842e7a8810bd8fa100d5c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/810c46b3-d6a1-4f38-b8cd-96df24198263/nuzarulalobufo.pdf
    • http://jinelod.rf.gd/call_app_caller_id_and_block_apk.pdf
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_f86e23b4b2c641b4a6adcefc859c93fe.pdf?index=true
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_6fc04443c84d44c285cfecdc47458e74.pdf?index=true
    • http://kosezofejesuxef.atwebpages.com/roubo_moderne_lart_de_la_menuiserie.pdf
    • https://uploads.strikinglycdn.com/files/06ae6bd4-ffa2-4810-a32f-7a88edf550df/yamaha_clavinova_cvp-83s_service_manual.pdf
    • http://niniwakuruvip.rf.gd/how_to_flip_houses_for_beginners_uk.pdf
    • http://jizopibijofiz.rf.gd/savogilasuredi.pdf
    • http://xulisaj.rf.gd/genetics_reading_comprehension_worksheet.pdf
    • http://sugamane.onlinewebshop.net/71640141201.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e165.bin
fc55c2ddf0ca267af37e60db480109e548dc5485e1284f0484d2e0bed1b091cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE165 6004 bytes
font_01_sfnt_off0000f5c3.bin
a02b7870c40c8a5fe1aacafb29af5b608f4eb926f10caba0c517e50651d97ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C3 11256 bytes
font_02_sfnt_off00011c4c.bin
96d287622a27e330ffe2d6360abe495ac7a1e0b845b943eef056495802289d91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4C 16088 bytes

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