Malicious PDF — malware analysis report

Static analysis result for SHA-256 072c0aca4be4c793…

MALICIOUS

PDF

74.2 KB Created: 2021-06-02 00:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3fabf8c93d9de8c59441347b3a7b4d91 SHA-1: f35dc2a0c31578698a0c4dce2453ee5d59f4bd30 SHA-256: 072c0aca4be4c7938f1626260db06bdd2adec9f43032854f826b926b9a082488
186 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 0.9998

Heuristics 6

  • 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.
  • 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://garglob.ru/pbw?utm_term=descargar+the+legend+of+zelda+4+swords+gba+espa%25C3%25B1ol PDF link annotation
    • https://xibagepop.weebly.com/uploads/1/3/1/4/131438114/puvamim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_603a416c7f027.pdfIn PDF document text
    • https://xexomogaju.weebly.com/uploads/1/3/1/4/131438449/7913211.pdfIn PDF document text
    • https://bexizesuxeneze.weebly.com/uploads/1/3/4/6/134634073/vivogasapopari_mebev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_60497c7326975.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/xutavivemamo-jezibunawoze-navezitizovudep-bizedunexaxowub.pdfIn PDF document text
    • https://fufosasoxesa.weebly.com/uploads/1/3/2/7/132740234/5617440.pdfIn PDF document text
    • https://bezujopejot.weebly.com/uploads/1/3/1/6/131606295/gudax-nomikiwatufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387229/normal_603af6b7db39b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ef5b9d-e47e-4dc0-9ddf-1c5db3f51d5c/gatosoluveputudi.pdfIn PDF document text
    • http://zikasamu.pbworks.com/f/download_film_ninja_assassin_2019_full_movie_subtitle_indonesia_mp4.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/f/what_are_the_7_leadership_styles_forbes.pdfIn PDF document text
    • http://gogoporiwo.pbworks.com/w/file/fetch/144480723/notunupinugezekirenawowo.pdfIn PDF document text
    • http://ruwomodanom.pbworks.com/f/pcsx2_usa_bios_free_download.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/f/how_to_measure_transformer_winding_capacitance.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/w/file/fetch/144444642/sociology_down_to_earth_approach_14th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94b42c2-75d5-4fb9-a505-ac31955f646f/platicas_bautizo_chihuahua.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144424233/formato_pagare_2020_para_imprimir.pdfIn PDF document text
    • http://bilabegape.pbworks.com/f/download_apk_any_video_converter_for_pc.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_off0000e0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D3 5996 bytes
SHA-256: d506337bedd60731da9690055da1b2f08ed4fcf30561a47d2a8e3903fb4aee36
font_01_sfnt_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 10612 bytes
SHA-256: 2d7c71efe71d00b51dec1a66d83a280cde5fee3bf49ceec53258f7474f666016