Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a88519ba7a902a…

MALICIOUS

PDF

80.0 KB Created: 2021-03-17 09:19:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 179eb246f037455a1af8180ba43752a1 SHA-1: 4e6676500d1a289e3bcf112559f63deaef7aa24d SHA-256: c7a88519ba7a902a459008a73974f17cbb592c320960359f1256625420dc224b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

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://maypoin.ru/award?keyword=analytic+geometry+problems+pdf
    • https://cdn-cms.f-static.net/uploads/4443802/normal_60518e7e35892.pdf
    • https://static.s123-cdn-static.com/uploads/4456116/normal_60075a02903ea.pdf
    • http://sagokorize.22web.org/36341657352.pdf
    • http://budokudepa.scienceontheweb.net/74084881742.pdf
    • https://cdn-cms.f-static.net/uploads/4465147/normal_5fe982ea01b15.pdf
    • http://fuxutigox.mypressonline.com/47183266956.pdf
    • https://static.s123-cdn-static.com/uploads/4379961/normal_5fedc1df69fa5.pdf
    • http://bekopomulasebi.getenjoyment.net/easy_scientific_method_experiments_for_middle_school.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_c0fa24d3bd7f4aa8966e2fe09ff30a78.pdf?index=true
    • https://s3.amazonaws.com/sorogamat/54996200900.pdf
    • http://gobusef.rf.gd/pathfinder_iron_gods.pdf
    • https://s3.amazonaws.com/besafefaf/lumiditimiruxugulomiwive.pdf
    • https://2a04f01a-7147-4793-98aa-b59dc93e6f96.filesusr.com/ugd/efcdeb_62ff5ea351f24f28bc5d56936f62f915.pdf?index=true
    • http://femodizabofowu.epizy.com/bbc_radio_scotland_app_android.pdf
    • http://pimuxexud.epizy.com/wexugojuf.pdf
    • https://s3.amazonaws.com/divikufifir/anatomy_learning_3d_offline_apk.pdf
    • http://situzuwopemol.rf.gd/dovapoded.pdf
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_f11634025db54823a8eb861d60d3fcc6.pdf?index=true
    • http://xeviwusonoxi.rf.gd/fifty_shades_of_darker_book_review.pdf
    • http://vawerudarasikow.myartsonline.com/which_of_the_following_items_is_not_a_characteristic_of_a_process_cost_system.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_off0000f8bc.bin
b6628a432c4cf90ed5f39ba120820626f425ac390eda23b8c47b83cf11798191
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 5708 bytes
font_01_sfnt_off00010c1b.bin
15fc44bda6c32aa1a1f13a076aa541318dc8a78f6b95da74304caf1a589bbddc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 11000 bytes