Malicious PDF — malware analysis report

Static analysis result for SHA-256 d835b7b87df0d39c…

MALICIOUS

PDF

119.7 KB Created: 2021-03-15 10:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb1696aa237951e6792d01e0a45553ea SHA-1: 760bf9c525830a6ac89dfcf7988e3ffb71746a00 SHA-256: d835b7b87df0d39c3c549d39f77b4a7fafa10cef633573d9d50caf9ef7b6609c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into downloading a payload. The presence of a visual download button further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://vilenefex.ru/wix?keyword=gizmo+cell+structure+answer+key+pdf
    • https://cdn.sqhk.co/potasuregoz/hegdd0r/bike_rider_helmet_camera.pdf
    • http://fenotowibezusen.iblogger.org/nirunidonaboroximo.pdf
    • http://lessonsonline.site/tenebj0fh5.pdf
    • https://cdn.sqhk.co/tinipuded/Ad5ieev/34.pdf
    • http://autobuff.xyz/sun_joe_pressure_washer_2000_psi_home_depot9y6uq.pdf
    • http://blockhcain.host/samsung_hm1350_bluetooth_headset_manualowc3f.pdf
    • http://onesmall.space/cursos_de_ingles_gratis_online_para_adultosiz5p2.pdf
    • https://cdn.sqhk.co/tixunadegu/SHiLvha/35992824927.pdf
    • http://sluzhba1.net/69519116881byakr.pdf
    • https://cdn.sqhk.co/tolononof/Y9tjagi/gururorodupakiletixagus.pdf
    • https://cdn.sqhk.co/puwonereb/aghiihj/zegatoxapasofaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_fe9fa9a25c50430a89c1a17abcbd6ce0.pdf?index=true
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_9ca2fbc5327f4df187739ebc8d71ea18.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1c97581b-dcd0-44a7-8d06-e0cea7b94377/29895242636.pdf
    • http://wofodumav.rf.gd/vejimazitib.pdf
    • http://besinaxot.epizy.com/79568491168.pdf
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_88d8dde247814016a9aff967a9a77277.pdf?index=true
    • https://uploads.strikinglycdn.com/files/203b3bbd-4281-4142-9b68-45feff2a5fe2/what_do_you_mean_by_magna_carta_for_small_enterprises.pdf
    • https://uploads.strikinglycdn.com/files/6e7f23cd-8796-4ba5-84fe-e9ff0f1b1ec2/behringer_xenyx_setup.pdf
    • https://uploads.strikinglycdn.com/files/185080fa-a288-45b0-9db4-5c7d1cfd4ad0/putunizofurikevewatudob.pdf
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_a6566b335df44dcab463e59609c6d4b4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5e2adf85-9718-481e-90da-99ab1a4f9556/jakuvozisadudadexivi.pdf
    • http://fedokow.rf.gd/fufasovumevamaguvupojotof.pdf
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_7786c28032a445d09ad2ed8d9882536d.pdf?index=true
    • 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_off000182cf.bin
33abd8f815848b44aee677a9613a60dc40bc0764a99572d4548375b2e9e667ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182CF 5524 bytes
font_01_sfnt_off0001959f.bin
30d1ce3014f9f28a85a85a11ce946b1d7c09bfd3819d81a51f9b38f7ccacdd40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1959F 13460 bytes
font_02_sfnt_off0001c274.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C274 4324 bytes

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