Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85d8c44b8feb726…

MALICIOUS

PDF

78.4 KB Created: 2021-02-15 21:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 70cb2cf629b0b697ce90cae724ae4187 SHA-1: d52c620b0ad2c3f560ffff5c09e0e62602d1eb6c SHA-256: e85d8c44b8feb7260b005b7f564f5092e990a1668cdbd25ddb65a360d6fd3f88
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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/123?utm_term=beats+solo+pro+o+studio+3 PDF link annotation
    • https://cdn.sqhk.co/felebamifuk/rfqpngf/hollywood_best_imdb_movies_list.pdfIn PDF document text
    • https://cdn.sqhk.co/sivadapexiri/oihtjmi/porsche_panamera_turbo_s_drag_race.pdfIn PDF document text
    • http://rubeatyshop.xyz/wofiwivukivisogox0t8r6.pdfIn PDF document text
    • http://steh-sistem.ru/35806763096o4dea.pdfIn PDF document text
    • https://ninuwekij.weebly.com/uploads/1/3/4/6/134625354/5178269.pdfIn PDF document text
    • https://favexolifuluk.weebly.com/uploads/1/3/6/0/136092880/lemimowi.pdfIn PDF document text
    • https://nalufubuxozukex.weebly.com/uploads/1/3/4/4/134479837/2783542.pdfIn PDF document text
    • http://reduslimitaly.website/archer_hotel_nyc_reviews7huoz.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/caging_skies_download2nd3x.pdfIn PDF document text
    • https://zemijawa.weebly.com/uploads/1/3/1/0/131070152/a3b75.pdfIn PDF document text
    • https://nirefuriwubava.weebly.com/uploads/1/3/1/6/131637308/laguboxotegolib.pdfIn PDF document text
    • http://podarokinsta24.online/watch_a_quiet_place_123movies1mppi.pdfIn PDF document text
    • https://wemupubipu.weebly.com/uploads/1/3/5/3/135331653/kunareduwowunuvules.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/sudevejerifu/tr_movies_net_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/fefivetufaf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 5164 bytes
SHA-256: b7e41be28d48b99f2aa5758eda3ea45141236043543dddbc6505fb25ea21513d
font_01_sfnt_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 12220 bytes
SHA-256: 3fc55a30946b9d57273916224dff35fb9fa8925570afda0e68defbaab05a1e68
font_02_sfnt_off000117d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D4 16060 bytes
SHA-256: c46c0605e6de68f526770b35f02e9451d7ae7c0e0d79b6a66872b6650ded16ce

Open this report in the interactive analyzer, or submit your own file for analysis.