Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da0a8b0ba790a49…

MALICIOUS

PDF

87.1 KB Created: 2021-03-15 21:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a49e4c668630688eb7fca4a8021830e SHA-1: df64fee0c5dbbd55d45aa16a914838f49b9e22a6 SHA-256: 5da0a8b0ba790a491eb9377d5da7abf7a4ff5ee79d774f56be6fc8c8f4ab156b
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, suggests a lure related to a document summary, likely intended to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=invisible+man+summary+chapter+wise
    • https://cdn-cms.f-static.net/uploads/4447437/normal_604df3e548156.pdf
    • https://static.s123-cdn-static.com/uploads/4384308/normal_5fe0200df2546.pdf
    • https://cdn-cms.f-static.net/uploads/4450354/normal_604b665bf3b0b.pdf
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5ff0a31613312.pdf
    • https://cdn-cms.f-static.net/uploads/4458161/normal_60167e12db96f.pdf
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5fe8bb64b62e3.pdf
    • https://cdn.sqhk.co/letiludixo/inaiaJ4/zepeto_para_pc_descargar_gratis.pdf
    • http://ripozeda.iblogger.org/konica_minolta_bizhub_c224e_driver_download_windows_7.pdf
    • https://cdn-cms.f-static.net/uploads/4450638/normal_603487d41a703.pdf
    • https://cdn-cms.f-static.net/uploads/4424692/normal_6015db27af762.pdf
    • https://cdn-cms.f-static.net/uploads/4377414/normal_6026b51cc96f0.pdf
    • https://cdn-cms.f-static.net/uploads/4459483/normal_60334b3ba3d71.pdf
    • https://cdn.sqhk.co/wuwoxegolewa/jdphghi/chinese_kung_fu_meditation_music.pdf
    • https://cdn.sqhk.co/zatovafer/03pQjbd/triaxone_1g_vial.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2f98cc11-44c8-4ac0-85cf-9f0a8abe6c8e/zedudupu.pdf
    • https://uploads.strikinglycdn.com/files/af57449a-411b-4b73-8b0e-5d1f9c41c633/bosuwadojefuje.pdf
    • https://uploads.strikinglycdn.com/files/68bb6101-0c45-4d0d-af31-9a783c8037fb/17185454125.pdf
    • https://uploads.strikinglycdn.com/files/32ff1a67-a892-4ecb-b574-1c5015a1be02/68473286776.pdf
    • https://uploads.strikinglycdn.com/files/4f3975b2-e103-41a5-9829-76e38c367a84/76752150906.pdf
    • https://uploads.strikinglycdn.com/files/c0e43fc6-a167-461d-b9f4-41bc8ca72249/27000285683.pdf
    • http://vufagozujidivu.epizy.com/appraisal_letter_format_for_employer.pdf
    • http://jusarim.epizy.com/dapageruwobixamanasukobe.pdf
    • http://faxogego.epizy.com/bollywood_film_background_music_free.pdf
    • https://uploads.strikinglycdn.com/files/948d8db9-28af-4a23-9523-f0f008cb3286/vajumorojex.pdf
    • https://uploads.strikinglycdn.com/files/40a43de6-0b00-4c34-aed2-b7817b025e95/great_dialogues_of_plato_the_apology.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_off00010c17.bin
bb86795646f0d363b1133b6026229c9c8396e963044f747d9bad60fa5b78d528		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 5276 bytes
font_01_sfnt_off00011ddf.bin
828ba880e97df8b89565df786fb3372a5771768a45ab9040e240503c112ab1dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDF 10096 bytes
font_02_sfnt_off0001407c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1407C 4324 bytes

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