Malicious PDF — malware analysis report

Static analysis result for SHA-256 669be2d8d90523a1…

MALICIOUS

PDF

72.6 KB Created: 2021-03-07 04:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: be8280478bf9976ec540da4e3e610868 SHA-1: 81b9fbae036470157a8c73d413a5952df948b5ac SHA-256: 669be2d8d90523a1bd812d172ae65c762f349bc5a4ed1a48c614148b8598b6e7
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body and extracted URLs suggest a lure for downloading software, specifically mentioning 'all in one apk free download'. The presence of numerous external URIs, many hosted on disposable domains, indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=all+in+one+apk+free+download PDF link annotation
    • http://newuwedeza.mypressonline.com/26253857983.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/examples_of_critical_thinking_in_real_life.pdfIn PDF document text
    • http://rejawulomov.mywebcommunity.org/saeco_odea_giro_precio.pdfIn PDF document text
    • http://13millions.store/recursos_literarios_el_conde_lucanor692wr.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/20732853112.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/59138128358.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/the_proper_style_for_an_argumentative_essay_is_formal_casual_informal.pdfIn PDF document text
    • http://reznitskygallery.com/2014_jeep_grand_cherokee_service_shifter_fix072g2.pdfIn PDF document text
    • http://bestcreditcheck.info/139723270976oka2.pdfIn PDF document text
    • http://goshop32.site/jatni_weather_reportvttl1.pdfIn PDF document text
    • http://complerbnp.com/powerful_intercession_prayer_points6obf6.pdfIn PDF document text
    • http://1-bog.ru/doomsday_last_shelter_guide7sbe5.pdfIn PDF document text
    • http://6gusevshop.website/accident_reporting_center_windsor_ontarioi8c8q.pdfIn PDF document text
    • http://zanartcc.net/55755935073mnrv2.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/gumobaxepiso.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/10165424318.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jopubijako.atwebpages.com/wendys_junior_frosty_nutrition_information.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/71863452539.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_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 5004 bytes
SHA-256: cddb3e2c97b5ada6495ce9ec62cd67059d1bc90ad1a1d8f42946569b74c1e922
font_01_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 10240 bytes
SHA-256: 9ed2ae816fc8656ffc745ce7d352da3065a020af9e7f706e071165c8e6d5ae55