Malicious PDF — malware analysis report

Static analysis result for SHA-256 541dbb63eefdf5fe…

MALICIOUS

PDF

70.3 KB Created: 2021-01-29 08:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 66a39c68231e45433c4cc3ed18270185 SHA-1: 757a033cd89faa0abfcfa7cba14fae1aa27c885b SHA-256: 541dbb63eefdf5fe2a5171eb0f8733831027d49ce58fc59eac4790e1914b0c27
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/wb?keyword=free%20music%20download%20for%20iphone%207%20plus PDF link annotation
    • https://cdn.sqhk.co/gadewekunel/7hfsVjg/free_vpn_for_pubg_mobile_ios.pdfIn PDF document text
    • http://taxiditugivubed.iblogger.org/zamoxufavegowure.pdfIn PDF document text
    • https://cdn.sqhk.co/sofetarunox/gBgcQjg/guilty_conscience_lyrics_tame_impala.pdfIn PDF document text
    • https://vulazijol.weebly.com/uploads/1/3/4/6/134648863/ruvuvoxote.pdfIn PDF document text
    • https://cdn.sqhk.co/zovigobut/Ricgcja/how_to_make_a_paper_star_wikihow.pdfIn PDF document text
    • https://gufekesunix.weebly.com/uploads/1/3/4/8/134888283/4559133.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/giLjgjh/find_hidden_object_games.pdfIn PDF document text
    • https://xavamukunakupa.weebly.com/uploads/1/3/1/4/131437969/kedaxatibaze_dojiwefojamenif_fafesuxuxa_porarerili.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/6d884240c8387e.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/hgheDjc/how_to_make_cake_frosting_with_cream_cheese.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/nijudow/lose_yourself_instrumental.pdfIn PDF document text
    • http://wadokeg.epizy.com/warlock_pre_raid_bis_classic_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/jipirelekeregaxopune.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/53309944019.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/69211954845.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_off0000d590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD590 5524 bytes
SHA-256: e457cdf7e8facd505cb5fb767fadab4818dd6bc2eb6a5b78319cf654de5fc7b7
font_01_sfnt_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 10564 bytes
SHA-256: c6e64d6a79598d03edfac84d5e5a72bdc0900c625bdfe4a7f82291a8dc7e2aa7