Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae5a61a0e39c405…

MALICIOUS

PDF

76.4 KB Created: 2021-03-12 01:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0466f3bbd1ff5642378d641cf0151b7 SHA-1: eb85a0e7a562e15284ef31b671b4780d003bc881 SHA-256: 0ae5a61a0e39c4051bb2d060bbb8c75dece46ae1663a157aaaddb5ce9014bcaf
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to host or redirect to a malicious payload. The presence of a 'download button' heuristic further supports a lure-based attack pattern, aiming to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/wix?keyword=taylor+polynomial+calculator+multivariable
    • http://geniputan.66ghz.com/get_instant_payday_loan_online.pdf
    • http://kuvuradivikosef.iblogger.org/84009826306.pdf
    • http://tlgfree.xyz/atoms_and_their_isotopes_worksheet_answersjutge.pdf
    • http://hookup754.fun/how_can_a_book_make_you_feel1cxtj.pdf
    • http://stat-index-co.com/xepigejegekiximirikuurxel.pdf
    • http://reduslim-italiaoficial.site/browning_a5_light_twelve_owners_manualuqted.pdf
    • http://kolagiriwu.22web.org/bifeboxorubozoxusuzadipe.pdf
    • http://legendarycraft.ru/duvituzafakuzewap9678j.pdf
    • http://odemebayisitrafik.com/xapowddq53.pdf
    • http://bnl-jobs.com/linear_pair_postulate_geometryqilfo.pdf
    • http://rp-youtube.fun/singing_lessons_for_child_near_me0fmrd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lexituvom.epizy.com/42686148195.pdf
    • https://uploads.strikinglycdn.com/files/37d36e51-b223-418a-90ef-6a86875cfacc/newtons_third_law_of_motion_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/e528f7ad-8c19-4e9b-8368-a0c0347a7a6a/92304856118.pdf
    • http://xajejosiwoja.epizy.com/action_verbs_and_linking_verbs_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/a6e02dea-ece5-4c64-9214-b35d7fdaba3e/when_will_season_4_of_sword_art_online_come_out.pdf
    • https://uploads.strikinglycdn.com/files/2f357365-ac74-44cc-9200-8018aba573cc/how_to_cook_bacon_in_a_waffle_maker.pdf
    • http://vomogowejupilu.rf.gd/57613791650.pdf
    • http://pofumitiko.epizy.com/graphing_linear_equations_worksheet_9th_grade.pdf
    • http://jotikovan.rf.gd/94642079889.pdf
    • http://fekamenuzexogam.epizy.com/pedulosobezonu.pdf
    • http://ribuxuvotamu.rf.gd/ffxiv_dark_knight_guide_5._0.pdf
    • http://kibomurabinide.epizy.com/nielsen_breakthrough_innovation_report_2017.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e145.bin
59037146639555f484e13dc45fad430e89701df71dec52872fb6ccf5ce08f2c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE145 5036 bytes
font_01_sfnt_off0000f254.bin
29bd32f0ea4b2673bcaac9856ac75883b12a3830a0679390de2bcf974037905a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 10296 bytes
font_02_sfnt_off000115a0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115A0 4324 bytes

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