Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e7d58ff7023ed6…

MALICIOUS

PDF

77.0 KB Created: 2021-03-29 05:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 985569e17f27082b4fe19bb1356bf14b SHA-1: 267a04eac20893518fd405be643b4fe82b9876fa SHA-256: 45e7d58ff7023ed6f035d29371b9e0f1790f2f3dcf0c531409fbfd3429033190
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=distributive+property+ppt+6th+grade
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5fe81b84e01d7.pdf
    • http://sazaleve.22web.org/74395766374.pdf
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5fd7f264d40ef.pdf
    • https://cdn-cms.f-static.net/uploads/4368782/normal_603ce712a5a00.pdf
    • https://static.s123-cdn-static.com/uploads/4420025/normal_5fe23edfa5a83.pdf
    • https://cdn-cms.f-static.net/uploads/4421048/normal_60246a5827383.pdf
    • http://bitunowaluf.sportsontheweb.net/91472201604.pdf
    • https://cdn.sqhk.co/levowexesu/e91WhiI/98013462014.pdf
    • https://cdn.sqhk.co/makulowujip/rOij9gj/classic_labyrinth_3d_mod_apk.pdf
    • http://jasazotinalol.mygamesonline.org/perogifatapu.pdf
    • https://cdn-cms.f-static.net/uploads/4421464/normal_5fe646e52d6c6.pdf
    • http://zugemenelil.medianewsonline.com/shure_slx_frequency_bands.pdf
    • https://cdn-cms.f-static.net/uploads/4475734/normal_5fd6fd0f2ee83.pdf
    • http://newuwedeza.mypressonline.com/bedtime_stories_read_along.pdf
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5fe49555dfd78.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2cfcf09b-d36b-40ef-b15b-b52e67dd9d9b/what_are_the_major_themes_of_the_odyssey.pdf
    • https://uploads.strikinglycdn.com/files/362fa38c-f9cf-4652-a2ed-ad07e1626264/sinulujomegalipebajoza.pdf
    • https://uploads.strikinglycdn.com/files/3797d980-0673-4639-be00-647f8ed98874/fevagumale.pdf
    • https://uploads.strikinglycdn.com/files/388e40af-ee6f-4d32-9be1-6deaee8c1631/79377239811.pdf
    • https://uploads.strikinglycdn.com/files/9d114583-7b6f-4a2c-ac08-5f18cb6ac96f/how_to_draw_zentangles_for_beginners_step_by_step.pdf
    • http://litorow.myartsonline.com/5552497982.pdf
    • http://xagewojijakeri.rf.gd/cognitive_distortions_examples_worksheet.pdf
    • http://wewolasa.epizy.com/business_management_1a_download.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_off0000ec50.bin
421816720eb67a764763f3df3affc8b2fc8abf8787e4b6e9b166e4b0035271b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC50 5644 bytes
font_01_sfnt_off0000ff84.bin
7fabf37a30df60cd8f4e7fc744d9b0d5721abbfa1be5eaed5b870af9a2d05cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 11188 bytes

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