Malicious PDF — malware analysis report

Static analysis result for SHA-256 472bf51c5f4cb964…

MALICIOUS

PDF

246.9 KB Created: 2021-04-04 08:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c68a7fec9827abe21644d5a4421a3e88 SHA-1: d87d798ecc5de4c950460824cf9d2342524313bf SHA-256: 472bf51c5f4cb964bd6582d933772c790bbb46ae1b8e9a3ab5d54661c4f40ff9
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and a visual download button. The embedded URLs suggest a phishing or malware distribution attempt, masquerading as a document. No scripts were extracted, but the PDF structure and embedded URLs point towards a malicious intent to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9012

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=apache+hive+essentials+second+edition+pdf
    • http://kininorekuwif.iblogger.org/caustic_soda_flakes_msds.pdf
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/6806259d6d.pdf
    • http://physcoo.com/60277338808nlgj4.pdf
    • http://gukiduwonaxinef.getenjoyment.net/personal_administrativo_definicion.pdf
    • http://goldotzyv.ru/lulogisebenafugagakipalapffiav.pdf
    • https://nevofegef.weebly.com/uploads/1/3/4/8/134851200/933543.pdf
    • https://zomurudol.weebly.com/uploads/1/3/4/4/134492975/xelipabazo_wuduwumis_fodepi.pdf
    • https://sidujojuwizubal.weebly.com/uploads/1/3/4/5/134587716/sodinazorilo.pdf
    • http://elerctum.org/warudizarud79c8l.pdf
    • http://wotomonexu.22web.org/37636535630.pdf
    • http://tejasatobes.medianewsonline.com/why_does_my_garage_door_open_but_not_close.pdf
    • https://xirabefutabo.weebly.com/uploads/1/3/5/3/135323672/mokukadogepu.pdf
    • http://goxivomibivufuv.mywebcommunity.org/power_wise_28115g04_troubleshooting.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zapopododo.rf.gd/45792980739.pdf
    • http://gitodake.myartsonline.com/philippine_calendar_2020_printable.pdf
    • https://8d9f32f1-468a-4e6e-8fd0-236262902e57.filesusr.com/ugd/28860c_71a5fc44e2584bf0a094196546ca6a09.pdf?index=true
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_8591192f6ed94f1faf0681ccaa0eb6cf.pdf?index=true
    • http://xijejuvi.myartsonline.com/rational_numbers_class_8_worksheet.pdf
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_41afb8d132574a9e9da28b1ba5a11a67.pdf?index=true
    • http://vidarepi.epizy.com/catia_animation_tutorial.pdf
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_bf9f5bede306402282d1c23ca2d082d3.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://download.csdn.net/download/daniel851105/10899514
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000332b2.bin
c1520a4a032366907a6e3809e9ea0574cf31fa097c800520c7c9b7fa6d58f2fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x332B2 17284 bytes
font_01_sfnt_off0003695e.bin
4bb182af9afef398b1efe6265008990e634548a0260ff4476cc792e4eedb961a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3695E 4984 bytes
font_02_sfnt_off00037a47.bin
3e9802c62d32bdf049424f64ff6176045f68aa88779a80652b77d7a638215b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37A47 13036 bytes
font_03_sfnt_off0003a6ac.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A6AC 16204 bytes
font_04_sfnt_off0003bbda.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BBDA 4324 bytes

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