Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce3e688faf8f3c5…

MALICIOUS

PDF

91.2 KB Created: 2021-03-14 03:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e6f1f9a9789f0afe19301d10dc564ad SHA-1: 7140a3bb595834a71ba3619fc4cbe3ad770b676b SHA-256: cce3e688faf8f3c5b5cdaff8b0dfdeee23e49eaf10579686b7cfd4977c577f80
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for downloading further malicious content, disguised as an academic worksheet. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading a payload, likely a phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/wix?keyword=mla+parenthetical+citation+practice+worksheet
    • http://matteset-spon.space/padadevadesifavapinor4vh07.pdf
    • http://vinograd.io/insinkerator_evolution_compact_spec_sheetjlee0.pdf
    • https://static.s123-cdn-static.com/uploads/4365659/normal_5fc64c46c5bb9.pdf
    • http://womubudadumi.22web.org/cissp_all-in-one_exam_guide_9th_edition.pdf
    • https://static.s123-cdn-static.com/uploads/4368226/normal_5ffcd6ffbebc1.pdf
    • https://cdn-cms.f-static.net/uploads/4459054/normal_5fdc28c84cb10.pdf
    • https://cdn-cms.f-static.net/uploads/4485156/normal_5fd2de838f3dc.pdf
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5fd318a870de5.pdf
    • https://cdn-cms.f-static.net/uploads/4452173/normal_604181d0532fc.pdf
    • http://shopbest.online/57965512895oyhjj.pdf
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5fe8810bc473f.pdf
    • http://avtoshkola-region26.ru/swann_security_camera_4k_ultra_hdipi0f.pdf
    • https://cdn-cms.f-static.net/uploads/4383800/normal_60349f2641195.pdf
    • https://cdn-cms.f-static.net/uploads/4425915/normal_602eada619b61.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tinezedu/27785782255.pdf
    • https://uploads.strikinglycdn.com/files/8390415d-0e04-463f-9af9-b2530bad3394/gujenorawizixe.pdf
    • https://s3.amazonaws.com/mozedijiz/sobojugijepubukomewu.pdf
    • https://uploads.strikinglycdn.com/files/d867870b-1b77-4521-a65d-a6bf1d5900f1/wabovopuran.pdf
    • https://uploads.strikinglycdn.com/files/d7b2b7fc-37ec-4ff8-bd25-3aa667141bb3/vonulusotegaf.pdf
    • http://wilafavibu.rf.gd/google_maps_night_mode_android_auto.pdf
    • https://uploads.strikinglycdn.com/files/dfed6a85-402d-4b86-a952-06cf278fa11c/nedavevasazafofem.pdf
    • https://uploads.strikinglycdn.com/files/f8409f72-07fa-44b5-8c97-1c897f931e69/how_do_i_set_up_caller_id_on_my_att_phone.pdf
    • http://guvenup.epizy.com/67612135958.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e9a.bin
75c776dff99f3d298c023a2b574fd13597af904366e3b1757f145f099b9094f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9A 5180 bytes
font_01_sfnt_off00012052.bin
38d3d21d3941d06b6421665c663bb6ecfe326430984e0723fd7901818bb51c42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12052 11668 bytes
font_02_sfnt_off00014779.bin
b68585454c93154d2f013f46d776e9f15280ceaa3f11bd8449eea95e9fcb4881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14779 16276 bytes

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