Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f720867a82da914…

MALICIOUS

PDF

88.9 KB Created: 2021-01-29 22:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 350eaecf9baeb9cffaebe9c9c75526e8 SHA-1: d3a771abbc58ac4c0efcdd9809721a8c2647da05 SHA-256: 7f720867a82da9145cf2ac27e1feb6e5673b56f7d7c9e69f6d0517a5fe7ce3c5
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host malicious content or redirect users to a phishing site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of external URIs suggests an attempt to download further payloads or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/123?utm_term=c%252B%252B+vector+resize PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5fe8d9cbc7a81.pdfIn PDF document text
    • http://tikovg.xyz/93092339195m0ymz.pdfIn PDF document text
    • http://helpcontactform.com/stardew_valley_growing_grassf067v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383702/normal_600be173349a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387589/normal_5fdb7d4321bf4.pdfIn PDF document text
    • http://itwow.info/just_dance_now_apk_smart_tv_samsungmanf1.pdfIn PDF document text
    • http://3gusevshop.website/olympics_2016_medal_basketball0jfg3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5fd8e7decedd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414153/normal_6008c5e3d188a.pdfIn PDF document text
    • http://unityfree.xyz/face_changer_camera_apk_downloadj6nfw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_600b9e550327c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/levibutitukezuvijawovefan.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/27354216504.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/74784155219.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/32857948316.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/foxosijugegipidimibow.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 4568 bytes
SHA-256: 2741c1a86ac89ff05795c73166fd8d4cfda1ae4d887b7297e3c5e883d486f4c9
font_01_sfnt_off0000fa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00010598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10598 15836 bytes
SHA-256: 8880d7100de818c9772c34daf23af0cc5e284862413ef75e8ca5341e09142eeb
font_03_sfnt_off0001373f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373F 9512 bytes
SHA-256: e4ddca731728b2d07c570f82e8eb148e4d761d6aa8c6f1d6c74338b643065ce3

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