Malicious PDF — malware analysis report

Static analysis result for SHA-256 7342502ee79ed133…

MALICIOUS

PDF

80.1 KB Created: 2021-03-03 07:05:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 635812647be2bd5a22692d3a3efe7186 SHA-1: 4f12a7c52fb3708eae2c0a3f1e8c1c8a18fcbd67 SHA-256: 7342502ee79ed133975051983b091b5c5fc60a7d9ec7ac78b48ffc4268c232c8
166 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to decrypt a password-protected archive, a common tactic to bypass gateway scanning. The presence of embedded URLs suggests an attempt to redirect the user to a malicious download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/strik?utm_term=engenius+eap600+factory+reset PDF link annotation
    • https://cdn.sqhk.co/mexovaru/jagdosj/5188572491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_6028101b44b80.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/w3schools_python_tutorial_free_download.pdfIn PDF document text
    • http://bachanalytics.com/my_pet_animal_essayfsigp.pdfIn PDF document text
    • https://lejuziluzamof.weebly.com/uploads/1/3/4/8/134863123/9079353.pdfIn PDF document text
    • http://fitit.space/rujabivozurifuktn47d.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/average_salary_of_software_tester_in_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/dVhjxjb/how_to_bake_salmon_in_foil_425.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/jaijR1I/sarumojebunegiri.pdfIn PDF document text
    • http://davorivugexawu.sportsontheweb.net/53331289115.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/jcSyjb4/piano_keyboard_app_download.pdfIn PDF document text
    • http://hs-life.ru/how_to_turn_a_picture_into_an_oil_paintingnxgcf.pdfIn PDF document text
    • http://trikotoria.ru/gujekalavaxitas2diz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5ff4a31ac8619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc990e1cf929.pdfIn PDF document text
    • http://iblack.space/can_you_buy_a_crock_pot_lidbw15l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405206/normal_6003b37bbec61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fuvuvadut.onlinewebshop.net/parupizuvijozoxum.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/44098149944.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 5388 bytes
SHA-256: 3ccc64e90cf00e0457fda3c8b30ade63bfc1da532a85e0289125eadd17de1a4f
font_01_sfnt_off000100c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 10496 bytes
SHA-256: d72f63e34405446d9e619f18dbe45abc76f0019251b10283f046c2b619a1d3ce
font_02_sfnt_off000124b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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