Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90bd0cf54c71fd5…

MALICIOUS

PDF

69.5 KB Created: 2021-03-12 16:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1479679a91699439a0d5ab48b8a0bfe5 SHA-1: 91d8e0d0dc5aa7c93092591cb6d0bdb0fbf86d25 SHA-256: c90bd0cf54c71fd5db8039044ef2620f799862c4f292ff1d79536eeca3326a97
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which, 'https://nipisod.ru/123?utm_term=bounce+tales+java+game+free', is presented in the document body as a free game download. This suggests a social engineering tactic to trick the user into visiting a potentially 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://nipisod.ru/123?utm_term=bounce+tales+java+game+free
    • http://nedavupagisezim.mygamesonline.org/povamidowinemotofize.pdf
    • https://cdn.sqhk.co/goxepijikun/9hfghVI/popular_zara_jeans_tiktok.pdf
    • https://cdn.sqhk.co/sixerusesebu/hhfjjDd/92844973129.pdf
    • https://cdn.sqhk.co/rukububibon/OYjggQG/xedogunidixakulimuwad.pdf
    • https://cdn.sqhk.co/mirofifuba/hshdJjh/sonny_with_a_chance_cast_season_3.pdf
    • https://cdn.sqhk.co/fabetojowuje/igiajTs/black_widow_trailer_screencaps.pdf
    • http://shortsomfj.space/80910139197xp1i7.pdf
    • https://cdn.sqhk.co/tufiroxova/fYiaEfW/wejet.pdf
    • http://tonemisi.medianewsonline.com/pilot_operated_check_valve.pdf
    • http://pitushok.fun/wazoxoliwejixenemenemejfu.pdf
    • http://bet-info.ru/bawusefbmwn.pdf
    • https://cdn.sqhk.co/wejuladuke/dwdojbR/shark_eating_seal_cape_cod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aedff1cb-128b-4a4c-9413-ecd86c212251/how_to_fix_vicks_cool_mist_humidifier.pdf
    • http://fuwasal.rf.gd/division_by_two_digit_numbers_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/9efff23a-d0c7-460f-8e56-c616185aae6b/katzung__trevors_pharmacology_examination_and_board_review_9th_edition.pdf
    • http://bolunivagoxel.epizy.com/sovovofetuzebemakopoken.pdf
    • http://vabagez.rf.gd/29031484574.pdf
    • http://xolavozezimodan.onlinewebshop.net/troilus_and_cressida_ulysses_speech_act_1_scene_3.pdf
    • https://uploads.strikinglycdn.com/files/a4b84347-270e-42a4-ba4c-bbf612add031/libro_el_poder_del_pensamiento_positivo_norman_vincent_peale.pdf
    • http://mojenuj.atwebpages.com/xixeditojedizigip.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_off0000d1c6.bin
9d23600a99a7a0f80a15a4ce2d928ab5564c43957fbc420f7d9de9fbc860fc15
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C6 5388 bytes
font_01_sfnt_off0000e417.bin
0e25a2cfae9be340725586f67bd29022795cbb7e6570be7c796df91f0f5f7c46
pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 11008 bytes