Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b8da37402d60d0…

MALICIOUS

PDF

79.2 KB Created: 2021-03-30 03:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dbf33274c0fc3d8acbb3faddd7891f7 SHA-1: b836bbb5c502ecaa28c37cbe54a75bc7e59e8f09 SHA-256: 59b8da37402d60d0ba29e6259e96d32c94fd44c6e957fe6b366d8ae6c77d360d
96 Risk Score

Malware Insights

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

The PDF contains heuristics indicating an external URI and embedded URLs, with one URL pointing to a phishing domain. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially corrupted, suggests a lure related to troubleshooting a 'weak or no signal' issue, likely to direct users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=why+does+my+dish+tv+say+weak+or+no+signal
    • http://suxelutete.22web.org/wisukekapekuwixuworolawit.pdf
    • https://cdn-cms.f-static.net/uploads/4369316/normal_605a9d4a5d213.pdf
    • https://cdn-cms.f-static.net/uploads/4494149/normal_6060a1150af2c.pdf
    • http://walamenaxonufo.22web.org/dumbbell_exercises_for_abs.pdf
    • https://cdn-cms.f-static.net/uploads/4473645/normal_60405992882f9.pdf
    • http://sdfsdfsdf.shaketorch.com/autoestima_para_adolescentes.pdf
    • https://cdn-cms.f-static.net/uploads/4412195/normal_5fdb00498ae36.pdf
    • https://cdn-cms.f-static.net/uploads/4387419/normal_60454aabae03f.pdf
    • http://juladolagu.iblogger.org/24685995771.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a7529fd2-d801-415f-bd5b-60d570678577/philips_universal_remote_cl043_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/37934dd0-ec88-4a16-b0dd-6abc4d433ffd/pop_up_mechanisms_templates.pdf
    • https://s3.amazonaws.com/zolerazowubow/62388946298.pdf
    • https://uploads.strikinglycdn.com/files/e986f79a-e4f6-48f4-aba4-817b0cb39278/what_kind_of_intermolecular_forces_are_present_in_ch2o.pdf
    • http://vazalavowudepip.epizy.com/fuzawuxuvisajotojivini.pdf
    • http://rigudigomotokax.epizy.com/which_of_these_agatha_christie_novels_stars_hercule_poirot.pdf
    • http://rumadedixigiwu.epizy.com/anatomia_del_cuello_humano.pdf
    • http://liroporegabofi.epizy.com/vepubuxinekevexawev.pdf
    • https://uploads.strikinglycdn.com/files/0825acc2-b832-42ca-8fb6-4a5123fe9c94/hardest_harry_potter_quiz_youll_ever_take.pdf
    • https://s3.amazonaws.com/purawuma/jematutufejuv.pdf
    • https://s3.amazonaws.com/wujafivabipo/77481445426.pdf
    • http://notijopozij.epizy.com/sekuwirufojuxejovonema.pdf
    • http://ketafek.epizy.com/garlic_planting_guide_australia.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_off0000eb37.bin
2ba70863766a24798da7750f610dcd8c6cf77559749ea06ed8d9140fe51e829c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB37 5360 bytes
font_01_sfnt_off0000fd6c.bin
434ca3072866ef23f019bb29cde669fe0007cffb2a06c8b3023734b3d106849e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6C 10416 bytes
font_02_sfnt_off00012102.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12102 4324 bytes

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