Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82678b5bdce7d55…

MALICIOUS

PDF

109.9 KB Created: 2021-03-17 06:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e287c9176490c62ccce17657d26f692c SHA-1: 1b68abb2360422879ff7661538bc6cfdec52f96b SHA-256: a82678b5bdce7d556ed35a7eb3377f3103063a3f168b203621694d1e114dd3a4
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://nipisod.ru/123?utm_term=rdr2+legendary+fish+guide', which is likely a phishing lure. The document body, though heavily obfuscated, suggests a theme related to 'Rdr2 legendary fish guide', indicating a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/123?utm_term=rdr2+legendary+fish+guide
    • https://cdn.sqhk.co/mipijotom/hjy7Fhi/xomitivagaxubozedojel.pdf
    • https://cdn.sqhk.co/sopiloroda/ifgcji2/mavivuvunino.pdf
    • https://cdn.sqhk.co/kelifevaz/hibxSge/13954597089.pdf
    • https://cdn.sqhk.co/tumitibira/ggo7icx/fallout_board_game_card_library.pdf
    • https://cdn.sqhk.co/xekemini/jIcgjlF/snapple_apple_facts.pdf
    • http://rijebipimaba.getenjoyment.net/91966550865.pdf
    • https://cdn.sqhk.co/talurelope/hzzjche/30985627541.pdf
    • https://cdn.sqhk.co/kugefiruxat/P1gjWgi/red_vs_blue_season_10_wiki.pdf
    • http://xomunuxeju.sportsontheweb.net/dusubukonezurusupavumi.pdf
    • https://cdn.sqhk.co/xajegakagiz/6KgfLi5/background_eraser_ipad_app.pdf
    • http://tuzogat.sportsontheweb.net/what_does_the_name_tanya_mean_in_indian.pdf
    • http://kixurox.getenjoyment.net/gawufibokutuxofed.pdf
    • http://kefijor.mygamesonline.org/menace_d_accouchement_prmatur_traitement.pdf
    • https://cdn.sqhk.co/badexejos/hbghghi/30789356026.pdf
    • https://cdn.sqhk.co/baruduwege/bkgigjh/national_championship_college_football_tickets_for_sale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/654ba6bd-073b-421e-8cd5-42dca1fdea01/65174637612.pdf
    • https://uploads.strikinglycdn.com/files/f8979c0c-4861-446b-a4ed-2cd9b250b71e/kokevabivexibujaguwuwa.pdf
    • https://uploads.strikinglycdn.com/files/818f9512-3f4c-4b42-b329-8d2fc2464398/nevefabegujori.pdf
    • https://uploads.strikinglycdn.com/files/98d1ed4f-3854-4a0e-bf2d-1edb2f9b4137/dovevowided.pdf
    • https://uploads.strikinglycdn.com/files/6939b302-9f82-4787-ba36-bab04b7147cf/firefly_promo_code_2020.pdf
    • https://uploads.strikinglycdn.com/files/87cfd04c-3806-4595-9687-c68b2c6c1182/dadeneneg.pdf
    • https://uploads.strikinglycdn.com/files/44d1ccf3-dbf4-4a98-a8a0-6aaf04f8ac36/piwasefadowukotuduxix.pdf
    • https://uploads.strikinglycdn.com/files/c6357313-3c11-4eff-bc04-11f6c91a545a/zalaredovem.pdf
    • https://uploads.strikinglycdn.com/files/a25da3f2-ed9d-4e12-af35-68465272d7f6/nuwinimi.pdf
    • https://uploads.strikinglycdn.com/files/95e2110e-3b09-4219-9145-e4439a0ed3ef/kozatumoxisebopuxibi.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_off00016517.bin
97a2163974e0ac7ee337f90612ccc474f536787b4331f6a46c7c18112630a7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16517 5100 bytes
font_01_sfnt_off00017666.bin
ad8550c723100241ca8f11fd34384d6355210b51798dc1ce27c3c00b4b39c429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17666 11116 bytes
font_02_sfnt_off00019bf4.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BF4 4324 bytes

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