Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37a939f0b75e4d9…

MALICIOUS

PDF

78.2 KB Created: 2021-03-20 14:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abd27645dc1f8666a9e68219acca3795 SHA-1: 8735bc925580321ffb1e84dbcf50dbec5f2ce6ab SHA-256: b37a939f0b75e4d9c7db13a1ef3f5bb029159d6c29c2013a80ce9978add20fe4
96 Risk Score

Malware Insights

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

The PDF document contains a URL that directs users to a website disguised as a troubleshooting guide for a Hayward pool heater. This is a common social engineering tactic to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/aws?utm_term=how+do+you+fix+the+hayward+pool+heater
    • http://xugaguf.mypressonline.com/30175173236.pdf
    • https://static.s123-cdn-static.com/uploads/4471692/normal_6001194bd5a3f.pdf
    • http://fukazab.mywebcommunity.org/sokilexivuvizosewafo.pdf
    • http://yellownatural.space/380112025551l59j.pdf
    • https://cdn-cms.f-static.net/uploads/4486215/normal_600ef4fdce52c.pdf
    • https://cdn-cms.f-static.net/uploads/4389603/normal_600ca5cac1c02.pdf
    • http://instapriz24.site/539412473541nos0.pdf
    • https://cdn-cms.f-static.net/uploads/4492536/normal_602645510f5e1.pdf
    • http://ig-copyrightnotice.com/650523816029hl8m.pdf
    • https://cdn-cms.f-static.net/uploads/4450242/normal_6049716c1ebe6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_debdf62f714047b5bee7262d161903a8.pdf?index=true
    • https://7b9449e5-51e9-4a7e-81f5-8587c42320f9.filesusr.com/ugd/571bad_15190215ecbd460ea8af7db75830faa7.pdf?index=true
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_0b301466680f45989fdded251be1c9f4.pdf?index=true
    • https://s3.amazonaws.com/pidufozu/your_baby_can_read_flash_cards.pdf
    • https://s3.amazonaws.com/latufenaw/network_diagram_template_free.pdf
    • http://lawupoxag.epizy.com/auditoria_seguridad_informatica_ejemplo.pdf
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_47b709158ef34a48af638e583849bfc5.pdf?index=true
    • http://xutenujute.myartsonline.com/explicacin_de_la_tabla_periodica_de_los_elementos_quimicos.pdf
    • https://s3.amazonaws.com/vatakefojunib/industry_research_reports.pdf
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_3a184828e5134b12850b39f8f73cbcb1.pdf?index=true
    • http://lakiver.epizy.com/feasibility_study_for_construction_project_template.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddca.bin
1e812c5aa3e2f48f5dea4035c01d2493cbac71cae873775ff8b32201c0c0497c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCA 4952 bytes
font_01_sfnt_off0000eeca.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEECA 1800 bytes
font_02_sfnt_off0000f757.bin
a735a4db5458536ddc6a010e9994a9fdd141e48a9786fa161ba94d0a80d26d3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF757 10424 bytes
font_03_sfnt_off00011af9.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 4324 bytes

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