Malicious PDF — malware analysis report

Static analysis result for SHA-256 575ee56b4fa45d3e…

MALICIOUS

PDF

75.5 KB Created: 2021-02-08 12:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a6e704f51ee3b5b2ca0aa4594015b1f0 SHA-1: be73872a7c9a7663c8a8ff6e56a6212b20c2ef40 SHA-256: 575ee56b4fa45d3eaa1a73b078abdee75746301a2dcbd70383716c95288aa832
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious workflow, likely involving the download of a second-stage payload.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wb?keyword=airline%20tickets%20responsive%20website%20template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446781/normal_5feb07667d0b1.pdfIn PDF document text
    • http://manthoughtswebsite.website/87249417448msbq8.pdfIn PDF document text
    • http://shoes-storie.club/dear_evan_hansen_sheet_music_piano_free32p5m.pdfIn PDF document text
    • http://mnclassis.org/usar_cabify_en_madrido5yba.pdfIn PDF document text
    • http://conicppjry.bid/sudoku_online_printable_hardspr11.pdfIn PDF document text
    • https://cdn.sqhk.co/zexukobesu/Cc2idii/4491591113.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390374/normal_60075b61b3336.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/59lDLjj/septic_tanks_for_sale_near_me.pdfIn PDF document text
    • http://cartest.pro/osrs_blue_dragons_guideq7c75.pdfIn PDF document text
    • http://supermagazforsale1.xyz/259036246921204i.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/a7391b870e82.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/5436255.pdfIn PDF document text
    • https://sijudunewofas.weebly.com/uploads/1/3/4/6/134696620/49e13e1f644f2.pdfIn PDF document text
    • http://vidclips.design/58668911604mfpoo.pdfIn PDF document text
    • https://kejojotevunujip.weebly.com/uploads/1/3/1/8/131871587/velinepitivesifixa.pdfIn PDF document text
    • https://gedinabudi.weebly.com/uploads/1/3/0/8/130814056/lozadiwep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 5424 bytes
SHA-256: c5cc1d1baa48f05f4a027005266ba1178c71f2f41d120d11b6dae5d771336b60
font_01_sfnt_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 10372 bytes
SHA-256: 96ad6a0d61d6f4dfaad151859ccb07f9a9559925a7b496246eb4d095588e91fa

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