Malicious PDF — malware analysis report

Static analysis result for SHA-256 3386ce28812351e4…

MALICIOUS

PDF

166.0 KB Created: 2021-03-22 17:32:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b46f9934031281d3e67fb51941722709 SHA-1: db95761bb63331d89284e1274d6d7ec3c92a0a24 SHA-256: 3386ce28812351e44f6aebccae43403e5910c88dc85a3b4b181c3b4222bc456f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to 'nipisod.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to a game challenge, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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/wix?keyword=hidden+fortnite+letters+challenge
    • https://cdn-cms.f-static.net/uploads/4472204/normal_601e90352b801.pdf
    • https://static.s123-cdn-static.com/uploads/4393508/normal_5fe33f3b6842c.pdf
    • https://static.s123-cdn-static.com/uploads/4366312/normal_600479126f042.pdf
    • https://cdn.sqhk.co/dosijowikul/0Qojd4d/fulewetatoxa.pdf
    • http://mafonofolifeda.22web.org/30382124268.pdf
    • https://cdn.sqhk.co/rapovixovuti/Cxjjhde/vegaloxiwuderunefafexebib.pdf
    • https://cdn.sqhk.co/vovewotutal/jb0gjhh/44816414671.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/65b75bb7-d64a-4095-9d35-da33f396d6b4/how_to_install_fivem_on_cracked_gta_v.pdf
    • https://uploads.strikinglycdn.com/files/22586e21-6b80-493d-9266-f1a001e9517d/fisher_price_rainforest_jumperoo_height_limit.pdf
    • https://s3.amazonaws.com/legipalofi/9x_movies_2018_hollywood.pdf
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_bf356231454e4c459d9612bfe2db39d5.pdf?index=true
    • https://s3.amazonaws.com/piwanisaj/8362435782.pdf
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_f49353fd415845c8be4613feb40ea33e.pdf?index=true
    • https://6974b9b2-fc2a-4e9b-9495-84ff65489eb7.filesusr.com/ugd/395280_257f7ca006514ad8beae7f8a1ba6a95e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/58c6a24b-d57d-4eb3-82bb-a0162b781994/dugipuzizor.pdf
    • http://xidatozekef.epizy.com/behavioral_observation_audiometry.pdf
    • http://xogegusubo.rf.gd/xikedi.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_87581c5eb2ec426ca8524845d779bfb0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/62dffa42-6d64-42e9-ba55-32542db8fc28/juegos_del_hombre_araa_en_moto_para_jugar.pdf
    • https://s3.amazonaws.com/rizoli/bakugan_computer_game.pdf
    • https://c208ddc4-37ec-4cef-823d-79aeaa8cd68a.filesusr.com/ugd/d34c4d_e0f115351d9f4e209c19fbf305634afa.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022faa.bin
d8b907802410e675ceca2784509e58a9dae2947c1b2ad43e3e0c02687eabed47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22FAA 2952 bytes
font_01_sfnt_off00023a38.bin
cd6860043743c0ace331dfcf4be38d890cfddfa2369eef60578dbba9954978d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23A38 5244 bytes
font_02_sfnt_off00024c08.bin
883af6cce7126625ff6e0d176486350cd3abb9f4db0e1281621dac7ffd4ad56f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24C08 11880 bytes
font_03_sfnt_off00027471.bin
795ec6381513c33b705d4afff73975cb99f2064ff5812dc1f83f670b855efd4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27471 16120 bytes

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