Malicious PDF — malware analysis report

Static analysis result for SHA-256 511c044359e2ad53…

MALICIOUS

PDF

77.7 KB Created: 2021-03-25 18:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e4de7af9f3ac74f5e0cbdd966f21aa7b SHA-1: 5098fa0f56c2380d72c8dd8aade62ccc19f13076 SHA-256: 511c044359e2ad537a32672a04914f3f6ba2c0f1bf33cd4737bbf61f2dd57dcd
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=does+northstar+have+half+day+lift+tickets PDF link annotation
    • http://domobifotuza.sportsontheweb.net/qu_es_lder_espiritual.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/gjeBhjl/kiwefoxi.pdfIn PDF document text
    • https://relodigiluburem.weebly.com/uploads/1/3/2/6/132681887/622babaa54.pdfIn PDF document text
    • https://fapopadiwa.weebly.com/uploads/1/3/1/4/131438416/rujamupemew.pdfIn PDF document text
    • http://pebunoguge.mygamesonline.org/zarolizamenelule.pdfIn PDF document text
    • http://zopesozali.mypressonline.com/antenna_handbook_theory_applications_and_design.pdfIn PDF document text
    • https://zujamabosav.weebly.com/uploads/1/3/4/3/134363941/kokikikezuperewez.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/fvhaagg/cell_to_singularity_evolution_never_ends_mod_apk.pdfIn PDF document text
    • https://makumagem.weebly.com/uploads/1/3/4/3/134373862/tiwevibutukunazudi.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/ijggdji/20221957490.pdfIn PDF document text
    • https://cdn.sqhk.co/birofinud/LrkgiQP/marketplace_mall_covid_testing_site_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/HDiasif/41090458620.pdfIn PDF document text
    • http://dvigatel.guru/what_does_culture_mean_to_you_job_interviewdaw05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/child_of_god_scripture_kjv.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/63840071010.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/pakistani_punjabi_audio_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/essential_literary_terms_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/94165099207.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/tubisob.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/cacing_kremi.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/89345750195.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/rozadesovasoruzosusefiv.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/winrar_free_64_bit_windows.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_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 5332 bytes
SHA-256: 080d6d02b55ebd5c8c788ae7bbc6a0980c6b55a4c192919b31ce5c04f898d298
font_01_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 11036 bytes
SHA-256: 48f67aa77e93e42e50ca72f800be76765cbdf1afc1941d6d13aa5da8690bd31b

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