Malicious PDF — malware analysis report

Static analysis result for SHA-256 1126fc68eb20a449…

MALICIOUS

PDF

75.1 KB Created: 2021-03-15 10:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e89332c075cfeefea9a71a8a8bf3071 SHA-1: 22db162bd0af8966836cfa2368e9f16edd3e4152 SHA-256: 1126fc68eb20a449fd6a8a0344dbdeb52a058414a72b8af97629c1aa2d4fd2d9
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to 'seumenha.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure, likely designed to trick users into downloading further malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=five+nights+at+wario%2527s+3+good+ending
    • http://xamoxipuwizutux.scienceontheweb.net/23968423184.pdf
    • https://cdn-cms.f-static.net/uploads/4448096/normal_5fe90d65c6e98.pdf
    • https://static.s123-cdn-static.com/uploads/4501360/normal_5fcad78ba3644.pdf
    • https://cdn-cms.f-static.net/uploads/4483604/normal_601f6d8621b91.pdf
    • http://rameautbxy.space/zombie_trivia_questions1ptt0.pdf
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5febf97488108.pdf
    • http://telgrm.site/932887827559oqqc.pdf
    • http://salizurewaki.mypressonline.com/simpson_3200_pressure_washer_pump_parts.pdf
    • http://familyit.pro/los_niveles_de_lecturab64ea.pdf
    • http://fbcopyright-center.com/iceland_guided_tours_from_london7e6og.pdf
    • https://cdn-cms.f-static.net/uploads/4485689/normal_603ff67e7b2a5.pdf
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fe12a86cab19.pdf
    • https://static.s123-cdn-static.com/uploads/4369774/normal_5ff0732538536.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vufuzewasi/report_fault_on_phone_line_talktalk.pdf
    • https://uploads.strikinglycdn.com/files/069f21ad-0f23-443c-9a40-488d1d16677f/gamirel.pdf
    • https://s3.amazonaws.com/padosumifubobo/37055211913.pdf
    • https://s3.amazonaws.com/buganabowumujef/monophasic_and_biphasic_liquid_dosage_forms.pdf
    • https://s3.amazonaws.com/tetofamuxulil/wasepu.pdf
    • https://uploads.strikinglycdn.com/files/de0cb62b-d31f-49dc-a4c7-7cd079e6d43f/44172744655.pdf
    • https://s3.amazonaws.com/midizaxopazeji/lg_lre3083st_01_parts.pdf
    • http://wutejaxevewef.myartsonline.com/kewesigijavoxapakuputefu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e864.bin
83f0563dab3a4e7e239080878414d9dc68924e53ea9f03590a795b2eded75238		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 5360 bytes
font_01_sfnt_off0000faba.bin
a2e4347afb60f4387a82f3b6b8ce82df1505ae828f750f0e1d0a6382b5bbe041		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 10436 bytes

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