Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea679ab7fd9bd8b…

MALICIOUS

PDF

81.9 KB Created: 2021-03-03 03:28:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: abab6f3db97faf9d1329fd0f26478760 SHA-1: a3cb9f601027186fe2d3df15d3c5cd04c08ca937 SHA-256: 2ea679ab7fd9bd8b11622dc7c9806892eb41b04e8f8029e41e97c04f354e63a9
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is designed to redirect users to malicious sites, likely as part of a phishing or scam campaign.

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 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://leonvi.ru/wix?keyword=wow+classic+warrior+weapon+progression+horde PDF link annotation
    • https://cdn.sqhk.co/fuxiwimemo/p0gegel/halloween_costumes_women_pinterest.pdfIn PDF document text
    • http://blog-millionaire.buzz/956866297716l4wz.pdfIn PDF document text
    • http://fruit-ita.fun/985680194150vnh1.pdfIn PDF document text
    • http://shimano-stradic.ru/commercial_dough_sheeter4d2ah.pdfIn PDF document text
    • http://fishland.store/lasimewitivarukosok2qde.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/9melUNG/39223407491.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/hdn1WPs/coin_master_gold_cards_free_2019.pdfIn PDF document text
    • http://begetus11ppz.xyz/planeacion_estrategica_idalberto_chiavenato_tercera_edicion_gratisudlbm.pdfIn PDF document text
    • http://natur-green.fun/joludusobh6kzv.pdfIn PDF document text
    • http://exampl1214.com/skype_7._40_softonicybblo.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/MCHZibX/toca_boca_life.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449392/normal_5feb1aff5964f.pdfIn PDF document text
    • http://govnososal.xyz/distech_controls_thermostat_how_to_use4ozwl.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_off00010278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10278 5440 bytes
SHA-256: d92eade557cc1f719a801e6228df514465908cc27417a095e40a31a4f989afc5
font_01_sfnt_off00011505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11505 10964 bytes
SHA-256: 4e2bcfd8355f69c181d675d3911a5286923851ca5d2c0ce0c4ceb03333aeec63

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