Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cc856d1e92ae7e…

MALICIOUS

PDF

69.2 KB Created: 2021-03-13 12:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 662c016bf49cbeceb16f059c3a284194 SHA-1: 0aab75ea86768b9d53abc598ae15c37f6ab18733 SHA-256: 71cc856d1e92ae7e9807e8bcd6716e7aef993439ac0028516276fda4cb193bab
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/aws?utm_term=casio+privia+px-150+power+supply PDF link annotation
    • http://nakekizedexu.getenjoyment.net/2019_nissan_versa_maintenance_schedule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_6030292d3c025.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/what_is_lambda_in_poisson_process.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/texebixamisuxiwi.pdfIn PDF document text
    • https://gidutuzewefira.weebly.com/uploads/1/3/1/3/131380066/c0bd9130.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/imax_b6ac_manual_espaol.pdfIn PDF document text
    • https://cdn.sqhk.co/kerikone/jcggjin/woodworking_projects_for_christmas_presents.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443372/normal_60061442afb26.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/ighUgjL/arlington_va_water_quality_report.pdfIn PDF document text
    • https://surugodinatuv.weebly.com/uploads/1/3/4/8/134861851/01f46c.pdfIn PDF document text
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/95d9110b2a8e1d.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/autumn_poem_analysis.pdfIn PDF document text
    • https://beburasitowetu.weebly.com/uploads/1/3/0/9/130969608/newalamu.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/vexov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409396/normal_60028ccedcc77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_603f1b8b68262.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/hhjiCad/jungle_heat_mod_apk_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/how_to_be_totally_miserable.pdfIn PDF document text
    • http://pulovuvaf.epizy.com/sensory_system_examination.pdfIn PDF document text
    • http://toduwez.epizy.com/digraph_ck_worksheets_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE52 5392 bytes
SHA-256: 2a9106477333830ad4e2470e6d9c6fd02d701542a973434caacea5ce61cf3ccd
font_01_sfnt_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 11084 bytes
SHA-256: 34e06cab41f6c7b857e3a2af8f79ce8dc6a4888e348ea702e212dde253baeb87

Open this report in the interactive analyzer, or submit your own file for analysis.