Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf99b4994eee4c19…

MALICIOUS

PDF

74.2 KB Created: 2021-03-24 16:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 592165149ac242dc6fee25c9206e5092 SHA-1: ec117ebf459ea093d466e953b1c19d33bbdc29c6 SHA-256: bf99b4994eee4c19f892b69d1dee5ab1a1421b19eeb8d8924a57726829003ffc
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is malicious and a phishing attempt. It embeds external URIs, with one prominent URL pointing to a download related to SharePoint 2013, suggesting a lure for users seeking software. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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://dafemum.ru/strik?utm_term=sharepoint+2013+foundation+download+iso
    • http://kigadotezolesun.mypressonline.com/common_sense_thomas_paine.pdf
    • http://gavolav.mywebcommunity.org/14832198160.pdf
    • https://cdn-cms.f-static.net/uploads/4455916/normal_6043ebb1db199.pdf
    • http://banepudota.iblogger.org/serial_do_windows_8.1_single_language_64_bits.pdf
    • https://cdn-cms.f-static.net/uploads/4383798/normal_6011d4c129836.pdf
    • http://neriwor.medianewsonline.com/rosencrantz_and_guildenstern_hamlet.pdf
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5feea695d4a85.pdf
    • http://balegetiwep.mywebcommunity.org/salupijiju.pdf
    • http://gadatoreneperil.mygamesonline.org/abs_exercise_routine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3098ecf3-7318-4b63-abd9-90acf2a027cb/kitanaxotizalujofiji.pdf
    • https://uploads.strikinglycdn.com/files/ccb076e4-0fe8-40e2-a419-802339aebb76/a_q_se_debe_el_dolor_de_mandibula.pdf
    • https://uploads.strikinglycdn.com/files/a253e39d-ce19-4526-a267-f06a27e75a49/stats_modeling_the_world_ap_edition_4th_edition.pdf
    • https://uploads.strikinglycdn.com/files/745029f2-25f0-4250-93ee-9daecd243274/verikejateveb.pdf
    • https://uploads.strikinglycdn.com/files/6d41e0ae-6ccd-425d-8093-d0832995675c/what_are_non_projected_media.pdf
    • https://uploads.strikinglycdn.com/files/d4aa356c-e5d0-43c7-85fa-df1dd0962968/pozidupijitujabodasonuw.pdf
    • http://setovoj.onlinewebshop.net/bajatawubited.pdf
    • http://katemezutam.rf.gd/73819909724.pdf
    • https://uploads.strikinglycdn.com/files/8986cbe8-d67d-49cb-b05d-570267bf0fe7/32521752451.pdf
    • http://ladinuronabo.epizy.com/bullsf_tutorial_install.pdf
    • https://uploads.strikinglycdn.com/files/aaf2c54f-c236-4926-b7e8-ab95bee999d6/72180075159.pdf
    • https://uploads.strikinglycdn.com/files/577658d8-bbf3-4a4b-a6b3-74950daa1a67/juxorag.pdf
    • http://sufuturafo.epizy.com/pharmaceutical_inorganic_chemistry_1_notes.pdf
    • https://uploads.strikinglycdn.com/files/22eba78b-2b33-46fb-a3fa-352af62e4348/gemokaxudotep.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_off0000e2f4.bin
f22ea454464e887d72cf658e10484e3e35762852103fad1411bea2ac045b0d3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 5812 bytes
font_01_sfnt_off0000f6cd.bin
834c636a71875eacbd032ab4269421ca9044771273fdcb0d993f8aebc107a2af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 10756 bytes

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