Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f24bd741bfed789…

MALICIOUS

PDF

84.4 KB Created: 2021-04-08 00:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abd4abf8e1b4d9555cff963b0b57a7dc SHA-1: e4995589b9858e1fd6c07d1d0c8204bee5c76705 SHA-256: 4f24bd741bfed789d16900e33b0691c02ebe03163e0dbe1bb372466a253bcf96
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a malicious domain, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further confirm its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest an attempt to redirect the user to a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wix?keyword=moulin+rouge+character+breakdown
    • https://cdn-cms.f-static.net/uploads/4380867/normal_602ceacd19e70.pdf
    • http://tolujupa.22web.org/hardware_components_of_a_computer_worksheet.pdf
    • https://cdn-cms.f-static.net/uploads/4480728/normal_603c1da4995d3.pdf
    • http://fudazozotakaxal.mywebcommunity.org/abstract_class_and_interface_in_java_with_example.pdf
    • http://simopuvoramawu.mywebcommunity.org/19802424651.pdf
    • https://cdn-cms.f-static.net/uploads/4412408/normal_5fd1a1d9c9645.pdf
    • http://femetorisufi.sportsontheweb.net/al_arabiyyah_bayna_yadayk_vocabulary.pdf
    • https://cdn-cms.f-static.net/uploads/4413019/normal_603889888581c.pdf
    • https://static.s123-cdn-static.com/uploads/4379222/normal_5fe554fb71603.pdf
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/dikotaxinobafi-vopifodepikuzu-rejujapexa.pdf
    • https://rozenawaxu.weebly.com/uploads/1/3/4/5/134517597/zamuwa.pdf
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5fcb6001b85b2.pdf
    • https://static.s123-cdn-static.com/uploads/4530910/normal_6005ed750ed5b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_7a53855f8f14457a88d78cb15db297e1.pdf?index=true
    • http://kuzojepume.epizy.com/guwipedoxitirarake.pdf
    • http://siwemoxoxawevuv.atwebpages.com/jabokinafarefa.pdf
    • http://nomijedelalevi.rf.gd/feneguvixudow.pdf
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_74410aabb0554f969e21913262e0d084.pdf?index=true
    • http://jafixomedimun.onlinewebshop.net/centrifugal_pump_characteristic_curve.pdf
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_cc32b113a09848369265eaa010fd7b16.pdf?index=true
    • http://levolavajoji.epizy.com/snow_white_with_the_red_hair_shirayuki_and_zen_fanfiction.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_off00010d54.bin
e83019d1b28c6cf844d445aa98eeb85fe4ae2bacad6fef2226ed7bae8bd91b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D54 5324 bytes
font_01_sfnt_off00011f85.bin
84c5bb1e8c2a2dfaa2e0b54c1a3f09661718dbc470f341fa86ed14dc19502961		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F85 11084 bytes

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