Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c458800d52d1d98…

MALICIOUS

PDF

82.2 KB Created: 2021-03-27 14:25:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a041e896ddc99361c29d5a562880078a SHA-1: 7b5e437762c96c40f7dc6daa4d8b5648934df323 SHA-256: 7c458800d52d1d987d0b9b288558884bf2d25507251b271521653175bc518643
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests an educational context, which is a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=identify+parts+of+a+circle+worksheet
    • https://cdn-cms.f-static.net/uploads/4369304/normal_602fb3e561387.pdf
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5fc7b8185c0a8.pdf
    • http://fisoxovazesenam.iblogger.org/cocktail_recipes.pdf
    • https://cdn-cms.f-static.net/uploads/4474191/normal_5fea129060c8d.pdf
    • https://static.s123-cdn-static.com/uploads/4378855/normal_60074759d546b.pdf
    • https://cdn-cms.f-static.net/uploads/4384036/normal_602ed1deb64bc.pdf
    • https://static.s123-cdn-static.com/uploads/4490917/normal_5ff861377c117.pdf
    • https://cdn-cms.f-static.net/uploads/4380682/normal_603b94e078d7c.pdf
    • http://sadifiba.iblogger.org/10700304200.pdf
    • http://damita.fun/6641386958985iks.pdf
    • http://hellesypakk.online/is_there_a_dress_code_at_disney_world_restaurantshlsrq.pdf
    • http://buylettersonline.com/96906944471jn9dk.pdf
    • https://cdn-cms.f-static.net/uploads/4471252/normal_605623cfc2a1f.pdf
    • https://cdn-cms.f-static.net/uploads/4488810/normal_60379cc7406f4.pdf
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5ff9cf167f13c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wavunot/what_is_the_central_question_behind_the_issue_of_agency_and_structure_quizlet.pdf
    • https://s3.amazonaws.com/fuwawibu/28148864609.pdf
    • https://s3.amazonaws.com/memobofilenabon/cotton_classing_report.pdf
    • http://tidalar.rf.gd/buselone.pdf
    • https://s3.amazonaws.com/wewuxuviwar/bacterial_transformation_without_heat_shock.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_off000103c1.bin
5c1906961dfba3561040aa2bc997dd5faf16f9dc534e328d8639a39c7dfd3873
pdf-font-stream PDF embedded font (sfnt) at offset 0x103C1 5440 bytes
font_01_sfnt_off00011659.bin
e03e0a5fa37f6e553cc253a55e4b7dd872a6c8c4e8aef023fb4c3ac703920772
pdf-font-stream PDF embedded font (sfnt) at offset 0x11659 10872 bytes