Malicious PDF — malware analysis report

Static analysis result for SHA-256 98711129c85a8d01…

MALICIOUS

PDF

174.5 KB Created: 2021-04-07 10:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23f41bafe3e6658a01b139dc66d79c5d SHA-1: d084e6bd4848d88bdc19d161058bc8dcc8860c4f SHA-256: 98711129c85a8d01a95bdf8860952254cc44e40888c22bb7bd379222c9dc2150
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document employs a social engineering tactic, presenting a lure to install a browser extension or update to view content, which is a common method for malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL points to a resource that likely serves the malicious payload, aligning with the exploitation for client execution technique.

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://resalured.ru/award?keyword=gluten+free+diet+plan+for+weight+loss+pdf
    • https://cdn.sqhk.co/pisapaxosabo/jcjaijG/wivelubokimazujajawal.pdf
    • http://siwivelijutore.medianewsonline.com/louisville_slugger_black_flame_pitching_machine_video.pdf
    • http://gedatidigog.sportsontheweb.net/cambridge_grade_7_english_past_papers.pdf
    • http://zipubezexupoka.mywebcommunity.org/tableau_training_for_beginners_in_hindi.pdf
    • https://cdn-cms.f-static.net/uploads/4484122/normal_60367e293abe2.pdf
    • https://cdn.sqhk.co/bezakebijuk/4hbWam0/miwero.pdf
    • https://cdn.sqhk.co/bizujonad/TpLZvoC/gajixe.pdf
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/2013919.pdf
    • https://cdn-cms.f-static.net/uploads/4472481/normal_5fe8b94dda834.pdf
    • https://cdn-cms.f-static.net/uploads/4413967/normal_605a5ec91f047.pdf
    • https://regakoxunurur.weebly.com/uploads/1/3/4/3/134380337/280fff29a7.pdf
    • https://cdn.sqhk.co/jigavozef/zNONiij/ghost_in_the_shell_arise_review.pdf
    • https://static.s123-cdn-static.com/uploads/4371787/normal_5fee014c850ad.pdf
    • https://cdn.sqhk.co/fofanibiv/eriguhi/accomplishment_report_for_ojt.pdf
    • https://cdn-cms.f-static.net/uploads/4379964/normal_606cd0762e251.pdf
    • https://xexajuxeleseg.weebly.com/uploads/1/3/4/5/134592224/jelavenemew.pdf
    • https://static.s123-cdn-static.com/uploads/4485308/normal_600275b945999.pdf
    • http://kalukoroduro.mygamesonline.org/belden_3106a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tikeresepujel.onlinewebshop.net/pojobomexix.pdf
    • http://pidodexogejax.myartsonline.com/xawusenivirolufenimib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013242.bin
b9fe4d6f2536972e410558e6ea425f2debd883de3ad5d943e765500f85d6cd12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13242 106792 bytes
font_01_sfnt_off00026fc2.bin
c3c72f6ee98015183b627b6242512ca7923b12ddc37b987d2438ea4bd12759d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26FC2 5428 bytes
font_02_sfnt_off00028249.bin
9969c642738ed3d2128069646f37e4ec58ec0129363d4d02b9171f331da5d693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28249 12272 bytes

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