Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f602672f2850d2…

MALICIOUS

PDF

80.9 KB Created: 2021-03-22 02:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee78c4cc2292f1bf5efb2a975892a2bc SHA-1: 5e9648adf38a8a4b2d91afdf464b5cc189062b83 SHA-256: a1f602672f2850d2e3ccae7b58af0fa651210cb6ca8c91c1a64205ff4242a7bc
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious URL, identified as a potential phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=cha+cha+job
    • https://cdn-cms.f-static.net/uploads/4405430/normal_6014679d6ddc4.pdf
    • https://cdn-cms.f-static.net/uploads/4424637/normal_604505a8ca5b8.pdf
    • http://vemafenuxaj.22web.org/bibuvuf.pdf
    • https://cdn-cms.f-static.net/uploads/4415055/normal_6014216e44687.pdf
    • https://cdn-cms.f-static.net/uploads/4501046/normal_601f23a30b5a7.pdf
    • https://cdn.sqhk.co/rufopunuk/khgC9wy/game_sound_effects_library_free.pdf
    • https://cdn.sqhk.co/luwibajik/lT9hiic/94851077638.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bifadiwuwileji/8497633385.pdf
    • https://uploads.strikinglycdn.com/files/47ba183b-1f3d-4208-8abe-131814d70c2f/zosamapujuwa.pdf
    • https://s3.amazonaws.com/kuboki/pdf_2005_honda_civic_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/b75fb8ce-0911-432c-918a-1f150069f959/7058298047.pdf
    • http://ketugida.rf.gd/office_interior_design_catalogue.pdf
    • http://kasowudut.rf.gd/85118603374.pdf
    • https://uploads.strikinglycdn.com/files/682eaf45-439a-4a8c-888c-d01b8e50d1f2/sibexuwugobaveku.pdf
    • http://leranijaw.rf.gd/binding_image_xamarin_forms.pdf
    • https://uploads.strikinglycdn.com/files/88d05c0c-4777-47ee-b434-375346c40db2/how_long_will_a_kinetico_water_softener_last.pdf
    • https://uploads.strikinglycdn.com/files/91b1dd64-fca7-4d74-be61-d199e8a83879/asu_mechanical_engineering_systems_major_map.pdf
    • https://s3.amazonaws.com/sizabo/mame_0.139_roms_pack_download.pdf
    • https://s3.amazonaws.com/jevopemosod/walevaxumunupugenu.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_off0000fe3a.bin
182de936bd44cbfa6217e47f262e56e82251c4c03112a6d196d107b875b8ad3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 4704 bytes
font_01_sfnt_off00010e37.bin
11a186b73fabef4f19ade656971383b6fd48fc6283ad7bb02efb0a5a45d624c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E37 12020 bytes