Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae16e86b4af426c…

MALICIOUS

PDF

78.2 KB Created: 2021-03-09 11:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ef2ee5bb2095e33aa5a5f371b32b2f5 SHA-1: 72a99ab4511c07dd9111060021ce9919c84f53af SHA-256: 1ae16e86b4af426c8f6235968453d2fb619da9fa4aa51eeb7f49c4c391544752
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, disguised as an episode guide. ClamAV and an ML classifier have identified this file as malicious, specifically a phishing trojan. While no scripts were directly extracted, the presence of external URIs and the nature of the detection suggest a phishing attempt to redirect users to malicious content.

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://dafemum.ru/123?utm_term=last+man+standing+season+6+episode+guide
    • http://bidizujimon.getenjoyment.net/competent_leadership_toastmasters.pdf
    • http://fuxanujibiz.mygamesonline.org/18777817043.pdf
    • http://bivaxosufuxibo.mygamesonline.org/what_are_the_primary_differences_between_tcp_and_udp.pdf
    • http://zajiledafalam.getenjoyment.net/assignment_problem_applications.pdf
    • http://valigulepi.scienceontheweb.net/how_to_connect_brookstone_wireless_speakers.pdf
    • http://zitugaxusi.mygamesonline.org/what_does_devolution_mean_in_ap_human_geography.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fowikorejodi/how_to_open_midea_washing_machine.pdf
    • https://s3.amazonaws.com/veledabejufi/bhakta_siriyala_kannada_film_songs.pdf
    • http://domebiwek.myartsonline.com/vexudowezutetipezetunimiv.pdf
    • https://s3.amazonaws.com/rupatojuko/cat_forklift_e-34_code.pdf
    • https://uploads.strikinglycdn.com/files/8b7b70af-98a0-4985-9a13-24332e3c1860/arris_tm822_ds_flashing_orange.pdf
    • https://uploads.strikinglycdn.com/files/ff70662f-52ed-40ee-ab2c-b9d83a8ce38d/53647665315.pdf
    • https://uploads.strikinglycdn.com/files/ddf461f3-ea5f-4306-8c97-8f56186c47ca/metodologia_dela_investigacion_definicion_y_caracteristicas.pdf
    • https://s3.amazonaws.com/xulepiwa/owl_apa_reference_guide.pdf
    • http://netawuwimirixor.onlinewebshop.net/how_to_set_my_grandfather_clock.pdf
    • https://s3.amazonaws.com/nelizenejakarug/block_puzzle_games_wood_collection_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/9668c213-ae5a-4e93-99a8-90a0dcee8906/fnaf_silver_eyes_book_read_online.pdf
    • https://uploads.strikinglycdn.com/files/733a53ce-49e9-43b6-801c-66c733f08932/82928948096.pdf
    • https://uploads.strikinglycdn.com/files/df70b857-5d0e-4adb-9b16-28db844dc3b8/rue21_careers_age.pdf
    • https://uploads.strikinglycdn.com/files/b701f625-4cce-47b3-9529-8b602bd320a6/nirvana_shatakam_meaning_in_telugu.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_off0000f407.bin
b61c2d2bba0e2f918454c8857ab909e42dd3b1bfbdeff3530e9132bc7c8c4c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 5244 bytes
font_01_sfnt_off000105d1.bin
d3dabd5bbbf90c8006b9df60b7fdad763dfecec4f289465e8171e7f3af820afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D1 10956 bytes

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