Malicious PDF — malware analysis report

Static analysis result for SHA-256 0166a07c05047827…

MALICIOUS

PDF

103.9 KB Created: 2021-03-04 00:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb83601b0caa18f308bea050388a723e SHA-1: 550204814fc16146d5c5bfd1c5a1ac965d25ff1d SHA-256: 0166a07c050478274cbf403c276d163f29eeb7edfad03f60c10099127acfd699
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 0.9997

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 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://golowaki.ru/123?utm_term=tipos+de+comunicacion+oral+debate PDF link annotation
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/zutawalikijugamo.pdfIn PDF document text
    • http://bexowobiminefi.mywebcommunity.org/mijekijegopozupat.pdfIn PDF document text
    • https://vubupegizisave.weebly.com/uploads/1/3/5/3/135315261/gejunelufuxana.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/how_to_connect_bose_901_equalizer.pdfIn PDF document text
    • https://vamubediva.weebly.com/uploads/1/3/4/9/134901044/5243233.pdfIn PDF document text
    • https://derajuxojop.weebly.com/uploads/1/3/1/4/131452827/gitixa-vuxidafopa.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/lakshmi_ashtakam_telugu_mp3_song_free_download.pdfIn PDF document text
    • https://sadavofabuloxus.weebly.com/uploads/1/3/5/3/135316226/vazebitulepekekan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/doxifuba/93531817604.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/esther_ahn_kim_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/77875575577.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/vagetavewasoma.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/82280493744.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/english_business_communication_teacher_s_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/naruto_shippuden_game_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/90239627682.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/nifumidopapo.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/valiant_2005_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB5 5192 bytes
SHA-256: 1c96a3b19213018579fd3db63a21a6d0a79f90e3d538d17f56ba4928e4eb6d00
font_01_sfnt_off00015c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C29 11820 bytes
SHA-256: d947755449b90351abcc1b6347648100eb36c263d45924e809146db867c75605
font_02_sfnt_off0001824a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1824A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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