Malicious PDF — malware analysis report

Static analysis result for SHA-256 296a55ba55b44354…

MALICIOUS

PDF

72.0 KB Created: 2021-03-27 19:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ab53fec5d1d2fd05a4c5fd3e0065be34 SHA-1: 68712f9b2ef9036daac8927797be7deff0576b84 SHA-256: 296a55ba55b44354d2626d6df8b319ebe00a71013e07330a5069691a86195275
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a link farm designed to redirect users to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=carranza+periodontologia+clinica+9+edicion+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423429/normal_602ed478a3ba2.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/ijijjVF/limorozavo.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/julagizidaxif.pdfIn PDF document text
    • http://nesobaka9.xyz/how_dua_istikhara_works8k9c6.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/21248837537.pdfIn PDF document text
    • http://idealslimitaly-official.site/99959740332mf0bj.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/hgijirj/surfski_ocean_racing_series.pdfIn PDF document text
    • http://jizerigozigalav.getenjoyment.net/schwinn_airdyne_ad_pro_review.pdfIn PDF document text
    • https://cdn.sqhk.co/bogebumemilo/hhgeaxp/dungeon_keeper_3_full_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/hLCkDgj/alchemy_element_symbols_tattoo.pdfIn PDF document text
    • http://gmetry.online/68851457018d3jpr.pdfIn PDF document text
    • http://shimano-stradic.ru/korivekizukudt83qh.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/84677823241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_60165eeee9928.pdfIn PDF document text
    • http://vinnipoh.fun/79462715510zoo63.pdfIn PDF document text
    • http://koprovk.xyz/rewijuleqvug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1e5893-7778-43e8-a6dd-0a5cdd3c513d/60262750466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92229c8-1f1a-450f-aee5-294ea0c600c5/construct_2_3d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e6847f-a3e8-4b05-93e4-c8e6cd87e4f4/65968320958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7bb15a-01eb-4120-8f01-2c209ccaa083/51537239687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13cae1c-cfaa-40b1-9bd2-137e4d32f13b/how_to_use_punctuation_with_quotation_marks_correctly.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_off0000da9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9B 5256 bytes
SHA-256: a998bfe0e77e3317ec6e9d34084a274c5ed16752111bdebba5b75f7938fee9da
font_01_sfnt_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 11172 bytes
SHA-256: 65703b60b6bf5fef9e155de7cde8dab989e61405d870a342c4f75e4945794c23

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