Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1122c0f0db4cdd…

MALICIOUS

PDF

78.9 KB Created: 2021-04-02 08:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3c2893790f41cf9136daad425eb679c5 SHA-1: f787777a8fb4c174627debab62f029b7fa02d380 SHA-256: 9b1122c0f0db4cdd62dfefc5125e8c96ec58cd71692ef05918fbc25084647452
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=english+vocabulary+in+use+intermediate PDF link annotation
    • http://garantiya62.ru/bodyguard_movie_20185kffo.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/33728692385iczpv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_6023d7ab1f125.pdfIn PDF document text
    • http://xirapanagix.getenjoyment.net/the_modes_of_ancient_greek_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5fe904364c4a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403824/normal_60020077da1de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_605ddcecdbab7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_602d308985fd5.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/algebra_regents_practice.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_a4b042157aef4321b83190d6ca14c6a1.pdf?index=trueIn PDF document text
    • http://gajopule.myartsonline.com/used_honda_rebel_300_abs_for_sale_near_me.pdfIn PDF document text
    • http://jezagap.epizy.com/weather_report_domino_theory_lp.pdfIn PDF document text
    • http://gusozafameximi.epizy.com/58468313308.pdfIn PDF document text
    • http://lunufisisosixi.rf.gd/business_studies_dictionary_apk.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/best_mop_robot_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/schindler_s_list_movie_in_tamilyogi.pdfIn PDF document text
    • http://kitutexedifepi.epizy.com/debovavujisifudap.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_8ce88a50a9f24fe881ef921d57fb95d8.pdf?index=trueIn PDF document text
    • http://tikinupuworate.rf.gd/que_es_un_plan_de_marketing_digital.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/android_activity_lifecycle_on_rotation.pdfIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_2118cd0e79404c4291407e40068404ba.pdf?index=trueIn 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_off0000e79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 5612 bytes
SHA-256: ba627c5d7ad61e256cd0c05a34657bb52945a6f453e3da886be96901b8d1303e
font_01_sfnt_off0000fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA99 22556 bytes
SHA-256: be29a784c428af77f685f7368c83022d0eec5515b4d2c2bd03f711f1e0580e30

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