Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25f6a77e56d23b8…

MALICIOUS

PDF

95.6 KB Created: 2021-03-28 14:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 716274acf2bb508bee177f30750baaa9 SHA-1: 4fca549582c2d95a7d57d8436765eab5347821d0 SHA-256: e25f6a77e56d23b81d537de21a98090ad72120a5cb6b203ed3441c16a76fe5bb
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a prominent one pointing to 'https://kuzutuzo.ru/award?keyword=june+affairscloud+gk+pdf', suggesting a phishing or malware distribution lure. The presence of multiple disposable hosting links further supports a malicious campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://kuzutuzo.ru/award?keyword=june+affairscloud+gk+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370063/normal_5fdfb3881ffba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fd79d93bc5e3.pdfIn PDF document text
    • http://aycotoro0.xyz/dance_music_80skxyme.pdfIn PDF document text
    • http://fragcups.com/all_recipes_baking_mixrhh4u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466398/normal_601cb2afb7441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454435/normal_5fc7b448602ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473419/normal_605eec501a258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468843/normal_603161f4d50f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404488/normal_5fc986840ccdf.pdfIn PDF document text
    • http://babysampler.com/fifeketojx4r1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_600baa28c3d54.pdfIn PDF document text
    • http://meetcabinets.xyz/vozifaxerekagogelelobalxkrht.pdfIn PDF document text
    • http://sbrf.link/arizona_master_gardenerz6e81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401559/normal_5ff0b40423d83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pegozegi/yodha_arjun_pandit_bhojpuri_movie_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d0a125-1e57-4dcb-942e-687bb3daa540/25578432512.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/ragisujodepetadotata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae4db32-6da6-4486-97dc-d0d94ca44cfb/can_i_activate_my_treadmill_without_ifit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95af1c80-482e-493d-8f32-9223fee114e6/what_would_happen_to_a_plant_left_in_the_dark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c57d2c-d063-4319-a2e9-06b2cf49cd96/how_can_you_prove_that_sunlight_is_necessary_for_photosynthesis_lab_activity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c35fa1-7d92-4f48-97c3-1ce8cfb4e523/42116714798.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/dixurotesoputobogefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0de316-b41c-43e7-afa7-8e26dec34a19/why_is_call_me_by_your_name_good.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/pentax_k-3_mark_ii_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c2270d-c3bb-44a2-b9b2-794eb3c5f080/resumen_de_la_obra_el_amor_en_los_tiempos_del_colera_corto.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12982 5180 bytes
SHA-256: 1d5270b765526db044e9ffec1ef5035d3400d1a7f0b7654a17721ff4edea2f1b
font_01_sfnt_off00013b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B23 11356 bytes
SHA-256: 78b175971409ff18940c4af29c8cbec0cbd0c4cd2d5f3703f8a65a25fb0d9d01
font_02_sfnt_off00016179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16179 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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