Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7d36fd06efbc39…

MALICIOUS

PDF

74.1 KB Created: 2021-03-18 07:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83f58b33b30b2643be05efbb305f1a25 SHA-1: d76582c0a70c5226ec8c717fb41255097b287669 SHA-256: 6a7d36fd06efbc396b876698c0c761fa6ee03dbb6b3670354e90338d20b4399d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that lead to suspicious domains, suggesting an attempt to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/123?utm_term=bootstrap+form+select+default+value
    • http://sexesex.site/16651416127s70sn.pdf
    • http://spain50off.info/financial_astrology_books_freeillcx.pdf
    • https://cdn.sqhk.co/xagaxubibiz/Xijfejd/voice_changer_with_superheroes_effects_mod_apk.pdf
    • https://jenosexafunira.weebly.com/uploads/1/3/4/6/134686035/siwisutoforevakig.pdf
    • http://mscgis.net/desopupgjohz.pdf
    • https://cdn.sqhk.co/niminililez/ipwhhdy/sword_of_chaos_facebook.pdf
    • https://cdn.sqhk.co/deloreba/aiel7jf/mod_bussid_motor_drag_racing.pdf
    • https://cdn-cms.f-static.net/uploads/4482858/normal_5fd64d5552f2b.pdf
    • https://cdn.sqhk.co/kigaratak/dgcliiU/durugavitobidake.pdf
    • https://static.s123-cdn-static.com/uploads/4409798/normal_5fc7ecc5624ae.pdf
    • http://ladyso.ru/zemovegafomifigo2jzm1.pdf
    • http://ogranicbio.fun/kenmore_he2_washer_motor_control_unit43s4t.pdf
    • https://bevifosadorafot.weebly.com/uploads/1/3/1/8/131856546/4f5425e.pdf
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/sowusovifusibig-lebewirakitof-sewunojageben.pdf
    • https://cdn-cms.f-static.net/uploads/4385859/normal_6030e85dba496.pdf
    • https://cdn-cms.f-static.net/uploads/4409827/normal_6023fb928f696.pdf
    • https://baxuzofagebem.weebly.com/uploads/1/3/1/3/131381850/tetesanuzujotur.pdf
    • https://dujikofuzi.weebly.com/uploads/1/3/4/6/134610135/defarisotaw-lesuso.pdf
    • https://cdn.sqhk.co/sawitofi/28VlibT/priority_passtm_membership_info.pdf
    • https://mokowevabib.weebly.com/uploads/1/3/0/7/130739664/xamodo_sisozelit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a261e678-44c0-4981-b3a9-9407bf52ee9e/lubinetizejog.pdf
    • https://uploads.strikinglycdn.com/files/051b2d84-8c48-4c4e-a930-1dd5fcbd45e9/what_to_do_if_you_forgot_your_rca_tablet_password.pdf
    • https://uploads.strikinglycdn.com/files/7d1b2f9a-7722-473b-bab6-ca9bb993ca60/casio_sgw_1000_compass_calibration.pdf
    • https://uploads.strikinglycdn.com/files/00989ad9-e259-44a5-8d0a-c216cb1aaeb5/lista_de_verbos_irregulares_en_ingles_en_presente_y_pasado_simple.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_off0000e4b0.bin
cbd09aac9edc25032b9c696d534bbc61cee4cccd53f6adeba5fb479e32abe429		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 5412 bytes
font_01_sfnt_off0000f70d.bin
60fb120a8a882a4e365a5e5ed0521ecc701b7dd69512ff07cd404da8c8293fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70D 10428 bytes

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