Malicious PDF — malware analysis report

Static analysis result for SHA-256 5172065289d643fd…

MALICIOUS

PDF

71.7 KB Created: 2021-03-31 15:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 951ff5f872678dedb21c04ede51f6982 SHA-1: dc45d60e14fc36f9fa429a5975ac264b0f8938e4 SHA-256: 5172065289d643fdcd64c395f8d857bcdbdabf921123c3cf9e95228262b5f076
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'bologen.ru', which is highly suspicious. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. Although no scripts were extracted, the presence of a malicious URL within the document body suggests a phishing attempt to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://bologen.ru/award?keyword=church+financial+report+pdf
    • https://cdn-cms.f-static.net/uploads/4484807/normal_606362f9dc0ad.pdf
    • https://cdn.sqhk.co/xezojutatow/bGichaJ/chuchel_game_play_free.pdf
    • https://cdn.sqhk.co/vigeroti/jcVg6bv/switch_colors_photoshop_shortcut.pdf
    • https://cdn-cms.f-static.net/uploads/4476943/normal_6030f85365b25.pdf
    • https://cdn-cms.f-static.net/uploads/4465136/normal_6032b84e28268.pdf
    • https://cdn.sqhk.co/vuwipabobatu/cZjj94u/outer_ear_infection_drops_over_the_counter.pdf
    • https://cdn.sqhk.co/zegapoxasut/coKLdic/super_mario_games_free_download_for_android.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b79d8b1f-d86a-4ca6-bdc0-06d948f46fb4/how_to_take_someone_off_your_best_friend_on_snapchat.pdf
    • https://s3.amazonaws.com/wofaxil/94649948646.pdf
    • https://uploads.strikinglycdn.com/files/da1d550f-52ee-409c-9fd0-1b7dae6f618f/96083288550.pdf
    • https://s3.amazonaws.com/ditiruz/28680557254.pdf
    • https://s3.amazonaws.com/tobaziw/ikea_catalogue_cuisine_2018.pdf
    • https://uploads.strikinglycdn.com/files/5f06a0b4-0d95-45e7-9930-fc7d2183b478/huffy_cruiser_bike_seat_replacement.pdf
    • https://uploads.strikinglycdn.com/files/307c40a6-b2e8-4b83-84a3-61b29669e888/how_to_install_keurig_water_filter_k_supreme_plus.pdf
    • https://s3.amazonaws.com/runuzitexokol/awei_bluetooth_earphones_user_manual.pdf
    • https://s3.amazonaws.com/tesodagiwor/35485229627.pdf
    • https://s3.amazonaws.com/kulinisokakewi/kunikelotebuluzuma.pdf
    • https://s3.amazonaws.com/dorulusof/49127844990.pdf
    • https://s3.amazonaws.com/kezemiradigu/xebunizagixedagum.pdf
    • https://s3.amazonaws.com/kisagoz/valon.pdf
    • https://s3.amazonaws.com/bitajemisajoz/pifixamirunogujadofazerew.pdf
    • https://uploads.strikinglycdn.com/files/1500e4e6-9538-4b4c-8cc1-e8eb29d79af3/which_three_branches_of_government_is_the_most_powerful.pdf
    • https://s3.amazonaws.com/gusule/wejoligemofazajuzi.pdf
    • https://s3.amazonaws.com/pokixovuxik/budabanifularavotidefov.pdf
    • https://s3.amazonaws.com/jawusawar/84044421947.pdf
    • https://s3.amazonaws.com/bepukuba/petsafe_rechargeable_in-ground_fence_receiver_collar.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_off0000dc25.bin
7c81b3866f73a91753ea8e11c1d5bb6557226f3814713f04be2d90540f53e4f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC25 4968 bytes
font_01_sfnt_off0000ed01.bin
994c745f0b26d4847d5f381e0eda9251504fd037bba56e1fa281f7906c4cdf51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 10132 bytes

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