Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b3f5d8005bc5c0…

MALICIOUS

PDF

76.1 KB Created: 2021-03-17 18:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ebda9a91e58b81386658cc8d15857f6 SHA-1: e8a883d355996b5ea94a85ca1b5f37f015ba14f2 SHA-256: 66b3f5d8005bc5c0f3ffd35a00ee2dd0cb8e79e8b1eed56c25524ed11f07bc5d
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 an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to reference a game manual, suggesting a social engineering lure.

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/wix?keyword=divinity+original+sin+ee+manual
    • http://big-ita.space/toguj32o5m.pdf
    • http://wusuraxirobi.iblogger.org/briggs_and_stratton_500e_oil_type.pdf
    • http://berkeciftci.net/51491128856eqrqw.pdf
    • http://gnatural.space/6429195700f4mx.pdf
    • http://pubggaming.online/stihl_electric_grass_trimmer_reviewjyths.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wixanarer/how_much_does_a_muffin_cost_at_dunkin_donuts.pdf
    • http://sevamunenu.epizy.com/513666669.pdf
    • https://s3.amazonaws.com/fajetufekejo/puroduxevetaxu.pdf
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_ed730c1d76e14101aacf5d6caef2c8e6.pdf?index=true
    • http://wikidupuzok.epizy.com/bootloader_samsung_galaxy_young_gt_s5360.pdf
    • http://gejaran.epizy.com/goxalaludusemanobemuvi.pdf
    • https://uploads.strikinglycdn.com/files/c853703b-92ca-4c62-89f9-40476a54dd35/fifty_shades_freed_movie_download_in_hindi_filmywap.pdf
    • http://sidukumu.epizy.com/live_oak_park_fishing_report.pdf
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_6998a326e6ea48c9961c2eb835fd64e8.pdf?index=true
    • https://s3.amazonaws.com/gotenukevepunin/46719159519.pdf
    • http://kuwubuvorij.rf.gd/25332938219.pdf
    • https://uploads.strikinglycdn.com/files/b5f9a365-a541-4121-b7fb-1bb4f3203cce/2600_magazine_subscribe.pdf
    • http://faninidup.epizy.com/kesala.pdf
    • https://uploads.strikinglycdn.com/files/6ea5758a-971d-4d8f-9edc-3203eaadba94/self_confidence_quotes_in_hindi.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_off0000effd.bin
8bac359dfc66f0f21dfd7cdb26f5366a2e3ca6258bb15142b0a52dddd179b624		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 5168 bytes
font_01_sfnt_off00010191.bin
53cacd56709f8a1ae0b31ff3056031d0aba52bc04dd0433f4869b9fe49adbfa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10191 9936 bytes

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