Malicious PDF — malware analysis report

Static analysis result for SHA-256 978271c438caac7e…

MALICIOUS

PDF

85.9 KB Created: 2021-03-04 18:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 75200118f8c4978e35b27c8437fd4692 SHA-1: ee5f0b3992aa95cb7d81684766ec55763e483511 SHA-256: 978271c438caac7e8529137bff6328821496778819d8a8dd246847c3e14d1daf
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=new+testament+books+written+in+hebrew PDF link annotation
    • http://agentsoft.space/xutebubeponiwownya3.pdfIn PDF document text
    • http://mantenancie.com/little_mermaid_wallpaper_hdig028.pdfIn PDF document text
    • http://forkidsshop.online/japoxoramupubopoxug8j.pdfIn PDF document text
    • http://copyrights-notices-helps.com/krav_maga_techniques_names9dtqs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421200/normal_5fe2ff7617385.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463009/normal_5ff757b771fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_602c40ff8bc58.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/dogubojadegusukega.pdfIn PDF document text
    • http://qqkaxes.xyz/nijisudemozasezibekutoluz53ph0.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/ge_spacemaker_xl1800_wattage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370051/normal_5ff1b2082787d.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/63873532790.pdfIn PDF document text
    • http://buytoday.cc/movie_themes_flute_sheet_musicbq2m3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366365/normal_5ff019060ee60.pdfIn PDF document text
    • http://ductsunlimitedins.com/fanozajedepesejizevasa9w1vh.pdfIn PDF document text
    • http://axecheat9.xyz/5.9_cummins_engine_service_manualh74mu.pdfIn PDF document text
    • http://ital-girl.space/522508935220racx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazepoxi.atwebpages.com/the_exorcist_season_2_episode_6_cast.pdfIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_bbb272b13f9c4b57ac53572c0b031661.pdf?index=trueIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_d2161536e03b4fb4bd80078f8e9bc2cc.pdf?index=trueIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_2db6eecafc3943cd8563d522a7b1c626.pdf?index=trueIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_70a4b6dde82a424094fb504f2c749c2d.pdf?index=trueIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_c6f0b8694f1142fdb80c72872f9c3920.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_355be49c0a3047449b4f624424be51ca.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000131af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x131AF 16908 bytes
SHA-256: c12dab04549db86dcbce4cd51e9b1bf93b1ecff6c6d7036456893d46ad35ad10
font_00_sfnt_off0000f83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83A 5160 bytes
SHA-256: 5a6a6c57f2f64dd337c7a88a9c4fb535f8fe943ea05bfeebb8e774da08fec29b
font_01_sfnt_off000109b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B1 11812 bytes
SHA-256: 6a62f815c73ead8dd44b6f5e68716cdd0797cfac11cd2f7a206701f0c42ecf69