Malicious PDF — malware analysis report

Static analysis result for SHA-256 1218d5b7d700585a…

MALICIOUS

PDF

72.7 KB Created: 2020-12-17 16:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf186209487a7c80b0216c5a58e85463 SHA-1: d9339f33d69f575d0406bcf511a6dc92f0dad0f2 SHA-256: 1218d5b7d700585ad0ccf699d3649bdca6a598c67bfe816dd90c0cb0c87a7436
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 URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though partially garbled, suggests a lure related to computer parts, aiming to trick users into visiting the malicious URL.

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://trafffi.ru/strik?utm_term=partes+de+un+computador+de+mesa
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f99d565d61c0.pdf
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f9199bd11980.pdf
    • https://static.s123-cdn-static.com/uploads/4446026/normal_5fcd9c5992f13.pdf
    • https://static.s123-cdn-static.com/uploads/4479679/normal_5fcc7e43348da.pdf
    • https://static.s123-cdn-static.com/uploads/4385434/normal_5fc73ddd94ec1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fce2f7b08bb286b7fcda3d5/t/5fd16e37880fa23343c8a4bd/1607560760432/mevekawawawe.pdf
    • https://static1.squarespace.com/static/5fc0f3af1c8c741314320bf8/t/5fc34a00f81c9a2a0c0bffbd/1606633984175/1985_evinrude_25_hp_manual.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/distinguish_between_intranet_and_extranet.pdf
    • https://uploads.strikinglycdn.com/files/0d5de0a4-a65b-403b-aaf3-699ea402b0e3/sevewozotevivivaj.pdf
    • https://static1.squarespace.com/static/5fc51cce8139af03766060b3/t/5fcf426f8b174454e99b9144/1607418480316/conduit_hole_filler.pdf
    • https://static1.squarespace.com/static/5fce3a70c83faa584acee8ff/t/5fd6d044034a586a4f54a71b/1607913552560/consultar_curp_nuevo_formato_original.pdf
    • https://static1.squarespace.com/static/5fc2a66ce5c7695ca9a6eb86/t/5fcc3fd583d2ac65cc06cddc/1607221205604/photo_collage_wall_art_ideas.pdf
    • https://uploads.strikinglycdn.com/files/c68411fd-7b4b-436d-95d0-338ab2f1666e/how_to_download_app_not_available_in_your_country.pdf
    • https://static1.squarespace.com/static/5fc562cd24b06a7eb31d7f51/t/5fcaeb34190ee82df8d29d59/1607134004918/pokemon_cards_for_sale_amazon.pdf
    • https://static1.squarespace.com/static/5fc7a1018d6e8c3767c46c74/t/5fd693ce7fc52c20692c9af5/1607898064276/xamarin_android_color._parsecolor.pdf
    • https://static1.squarespace.com/static/5fc54e01affbf90a6607a482/t/5fc64963e18c5c478ed0f726/1606830436066/noaa_weather_forecast_seattle_washington.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d48a.bin
0fa73188df72a850b0c63b4e2d6b5828a65918d7b4ec930b592abc26f23eaa51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD48A 5188 bytes
font_01_sfnt_off0000e614.bin
398db82c65746776f47112a7a0d7276f03e3b5b862efb5f66690d7f6aa2938f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 2096 bytes
font_02_sfnt_off0000ef25.bin
2c7bf8dc9a8d94ee850c2a0280a9b5e02fe59959fc04984ec572f494e21fb57f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF25 11240 bytes

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