Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf37a7f582a15075…

MALICIOUS

PDF

74.6 KB Created: 2021-02-28 04:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5c319660e6c3a77bbf2f04160cf3639 SHA-1: 694a35cad4a198dc92147711f69afae3b3b62b4d SHA-256: cf37a7f582a1507590862b5941f9ae03c05fd8f2cba8265f22f9ed7b352af8e5
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded external URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/aws?utm_term=ceas+casio+g-shock+ga-110rg-1a
    • http://aslixan.com/katya_elise_henry_workout_freeh4bel.pdf
    • https://cdn-cms.f-static.net/uploads/4369327/normal_601a3da1adf6c.pdf
    • http://ihsteam.ru/aula_f2088_manualx7m3l.pdf
    • http://xawamiwupajev.mygamesonline.org/how_to_renew_your_license_in_nc_online.pdf
    • http://xijulefabogi.getenjoyment.net/how_to_scan_any_barcode.pdf
    • http://qrettalq.online/20131330909ic1hk.pdf
    • http://tunizunifegitof.66ghz.com/xuxotenagowezibakafowiror.pdf
    • http://testvvd.xyz/rupepumedefiwakexawilam7m34.pdf
    • https://cdn-cms.f-static.net/uploads/4371267/normal_602bfa7febc40.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sukobogixe/bound_by_flame_trophy_guide_ps4.pdf
    • https://s3.amazonaws.com/zinudipir/vuzadimesurusababeg.pdf
    • http://tuwutexo.onlinewebshop.net/xefebisupokapujanono.pdf
    • http://faxiruvud.myartsonline.com/best_slide_in_electric_range_with_warming_drawer.pdf
    • https://s3.amazonaws.com/muvojugejoxip/attagasam_tamil_movie_video_songs.pdf
    • https://s3.amazonaws.com/tokudapele/lozotogum.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e968.bin
a560191546408bfeb48b3e4c0f7e22c55c86d8304c504a6f487546aeb6306ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 5224 bytes
font_01_sfnt_off0000fb2d.bin
286be72690b85434ef3c67e85c84d0b0bafcd864194e3d145b032e6c349060cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2D 10068 bytes

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