Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c60cedf86d757eb…

MALICIOUS

PDF

73.8 KB Created: 2021-03-16 10:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49aa62c63ebcbabbf373e8758bf926a4 SHA-1: 641646754b95c98748169e25d695e1b599b9eca6 SHA-256: 5c60cedf86d757eba146b1d1f22c998b7b6ed30b60e125561a432a25f830b176
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 a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to educational content, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/wix?keyword=algebraic+fractions+worksheet+tes
    • http://powajaxib.medianewsonline.com/56898207903.pdf
    • http://towonededuv.medianewsonline.com/what_shampoo_is_good_for_mange.pdf
    • http://kewokuxumuzig.medianewsonline.com/carbon_nanotubes_book.pdf
    • http://hh666o.site/prayr_god_simulatorsjmjt.pdf
    • http://site-shop.xyz/resumen_gramatica_ingles_b2l19fc.pdf
    • https://cdn.sqhk.co/zubavagi/dgjjfRl/retro_video_games_ringtones.pdf
    • https://cdn.sqhk.co/fufitefan/ijghijf/66170709202.pdf
    • http://boxberry-24.cc/jozotatotedejum9ijh.pdf
    • http://xizuwekimexuwag.22web.org/35061901854.pdf
    • http://lnstagramsupportingcenter.com/what_episode_does_damon_and_elena_kiss_in_the_rainpr5x8.pdf
    • http://canonsburglake.com/husqvarna_weed_eater_128ld_carburetor0c45h.pdf
    • https://cdn.sqhk.co/woxekivepi/ogqgigg/lefitofikujajojide.pdf
    • https://cdn.sqhk.co/lumonapopedi/iaYCuna/plenty_of_time_song_sheet_music.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c437a18f-8315-4eee-a91f-6340a3890cdf/quietside_mini_split.pdf
    • http://ribulobelirebu.epizy.com/nosinewumisosulazuxe.pdf
    • https://s3.amazonaws.com/tawosutosuxi/fokudojadavutabixenubu.pdf
    • https://s3.amazonaws.com/tawosutosuxi/contract_and_agreement.pdf
    • http://badizep.epizy.com/bikonu.pdf
    • https://uploads.strikinglycdn.com/files/09b45a2c-e187-4a39-89d8-08c7ca3df9b8/firigivudeluw.pdf
    • https://s3.amazonaws.com/nolarifaforuxop/adobe_reader_11._0._20_free.pdf
    • http://kakasis.onlinewebshop.net/lobegobudasokip.pdf
    • https://uploads.strikinglycdn.com/files/a90b9cfc-136e-4355-934a-07c40e99b855/40372963431.pdf
    • https://s3.amazonaws.com/venunamazozuzo/dazzle_fusion_software.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_off0000e28c.bin
bc4ada7efc9d4d3ec6e0f6466ffbad68ec687f7fcb12b66fdd622e9357eb5ec1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 5428 bytes
font_01_sfnt_off0000f517.bin
77ee3a3973a41bcb004e0101220cda90c71da39f7394fb5bb793227a16db41b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF517 10684 bytes