Malicious PDF — malware analysis report

Static analysis result for SHA-256 01677180a5c57415…

MALICIOUS

PDF

177.8 KB Created: 2021-04-29 11:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2072222f449f0794ead8837f4ad907d9 SHA-1: bc24578efe6b7bde9fcd36a13bcaa525998a2f43 SHA-256: 01677180a5c57415b3e74d792a311547023f409d2eae3f21d4758872fe801367
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to lure the user to a phishing site. The PDF structure itself does not contain readable content, but the presence of the external URI and the malware detection strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://jumiwimov.ru/strik?utm_term=arte+historia+la+guerra+civil+espa%25C3%25B1ola
    • https://cdn-cms.f-static.net/uploads/4421613/normal_603c40afba7f7.pdf
    • http://dorugatutaxovi.scienceontheweb.net/22533887468.pdf
    • https://cdn-cms.f-static.net/uploads/4454429/normal_5fd7eb03e5388.pdf
    • https://cdn-cms.f-static.net/uploads/4412379/normal_6027367dd5970.pdf
    • http://nokiwurugibub.mypressonline.com/marriage_certificate_translation_template.pdf
    • http://makelemeg.mygamesonline.org/powofurunupovawitu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_90ef4998611545a0b0ad7296bca9c420.pdf?index=true
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_f1b69ceeefb54ba3b97ed7049312b844.pdf?index=true
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_af0aa7abf3ea47cdb14c9aa78ca18f1e.pdf?index=true
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_a363684ad7cc42198cf0e549070e5c6e.pdf?index=true
    • https://s3.amazonaws.com/mudurixo/asus_xonar_dgx_5.1_vs_creative_sound_blaster_audigy_fx.pdf
    • https://s3.amazonaws.com/gofiguj/28726944152.pdf
    • https://s3.amazonaws.com/zozofufulolig/baby_checklist_uk.pdf
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_0a84f69f0d604b1f930072edf6b09da9.pdf?index=true
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_698469dceaa34dac9ae4b6d54ba27fde.pdf?index=true
    • https://s3.amazonaws.com/degagaziv/vujunixoxaxuj.pdf
    • http://gexegubiduw.atwebpages.com/propaganda_model.pdf
    • http://jasunusemoki.onlinewebshop.net/3828915521.pdf
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_658d723dee0f4c64bc30946671e9d015.pdf?index=true
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_f16b37be69b54281a205b91625a63fd7.pdf?index=true
    • https://s3.amazonaws.com/genijusemu/new_army_rifle_marksmanship_manual.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_off00026b3f.bin
8cb0f9eb4091a8ee59381069bc09a34558f200c698bd70385b9e697425a443da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26B3F 5232 bytes
font_01_sfnt_off00027d07.bin
30f8dc58079ac62aa10502bd93ee88b152885cd822e3f5d352e54789f20ae03b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D07 13972 bytes
font_02_sfnt_off0002a8b4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8B4 4324 bytes

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