Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebafde479a1a5185…

MALICIOUS

PDF

77.4 KB Created: 2021-02-27 02:14:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 56b89cff84a0483fd71d2d801ce4859b SHA-1: 1afbdfd269a5058b9427ef83734c82a94372e8fd SHA-256: ebafde479a1a5185c4be44a7a1b6d71adf8b974829433266b86a0315d1a4a8fc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to sites hosting malware or phishing content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/aws?utm_term=how+to+thread+husqvarna+emerald+116 PDF link annotation
    • http://nageramuvepom.mywebcommunity.org/libro_cien_aos_de_soledad_de_que_trata.pdfIn PDF document text
    • http://liketsven.xyz/howard_miller_grandfather_clock_setupnrkxv.pdfIn PDF document text
    • https://gejabadofezeda.weebly.com/uploads/1/3/2/6/132681436/wanef-fudubaf-tafebazurinoziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_60337dabbc58c.pdfIn PDF document text
    • http://afracheat9.xyz/rufibinuripileruwinatarvvq1r.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/wemabepaguzakusaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_603117d445e60.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/chocolate_war_movie_1988.pdfIn PDF document text
    • http://brumbum2.xyz/domino_s_free_pizza_clubikfp1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382976/normal_5fc59a228b87a.pdfIn PDF document text
    • https://lilugotowo.weebly.com/uploads/1/3/2/7/132711957/kibagiledi.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/45871257175.pdfIn PDF document text
    • http://thecet.xyz/alien_shooter_2_conscription4mhec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_601ec6e4270db.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/mosezavor/manual_de_control_de_calidad_juran.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/doziropubujupub.pdfIn PDF document text
    • http://nubomozakazir.epizy.com/exerccios_de_bioenergtica_alexander_lowen.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_off0000f151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 5512 bytes
SHA-256: 34d390b96acf9275df20a187e6b8db3d902044a675f8768040a8eb7ec15db3e4
font_01_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 10864 bytes
SHA-256: 64e6a84c5bb7af93908e6bde5e850287a604eb06697a07a25c54531a61aa7f28

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