Malicious PDF — malware analysis report

Static analysis result for SHA-256 a277ec94b7aac398…

MALICIOUS

PDF

100.9 KB Created: 2021-03-21 21:28:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf790319b299ece20e696a6c7a231c55 SHA-1: 720de25d2eab288b75dd425bfc0dfe3af036cc62 SHA-256: a277ec94b7aac3986cf2a82204c0dd5953280c8b8bffa3ceebf4c7ecc7d92bcc
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The document body, though heavily obfuscated, suggests a lure related to 'Arceuus runecrafting guide'. The presence of multiple external URLs and the ClamAV detection strongly indicate malicious intent, likely to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/123?utm_term=arceuus+runecrafting+guide
    • https://cdn-cms.f-static.net/uploads/4480891/normal_60314dd98c631.pdf
    • https://cdn-cms.f-static.net/uploads/4476140/normal_60536e4fbe9af.pdf
    • https://static.s123-cdn-static.com/uploads/4386094/normal_6000c330ecf27.pdf
    • https://cdn-cms.f-static.net/uploads/4414860/normal_60322e9f34b25.pdf
    • http://lnstagram-blue-ticks.com/pipitakalukf1zdq.pdf
    • http://smartcoin.design/luxpro_thermostat_wiring_diagrama12nf.pdf
    • http://subbellassecret.com/onn_remote_codes_for_lg_blu_rayx29q0.pdf
    • http://tekdouche.xyz/naruto_ultimate_ninja_impact_psp_apk993mx.pdf
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/ponikuzinam-xamezijemaso.pdf
    • https://pifaxatopegamu.weebly.com/uploads/1/3/4/1/134108845/kidotel_pabedi_tedereboz_zafuge.pdf
    • https://cdn-cms.f-static.net/uploads/4374520/normal_600b5e49bb045.pdf
    • https://zopiwaseka.weebly.com/uploads/1/3/0/9/130969839/71dff8fba707.pdf
    • http://krepezh.guru/pandoc_markdown_table_to2358e.pdf
    • https://fipowawebes.weebly.com/uploads/1/3/4/6/134601566/nefidosarovaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2beb737d-17d4-4353-88ff-66bae5085ced/82384482381.pdf
    • https://s3.amazonaws.com/fomudebipefasu/how_much_is_a_vermont_castings_wood_stove.pdf
    • https://s3.amazonaws.com/xakusineba/bokuneriwuta.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_8235d0639aed417994682d79647bf32b.pdf?index=true
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_ef15b884ee554d50bc5798653b749e19.pdf?index=true
    • https://s3.amazonaws.com/busutafitufe/what_does_joker_say_after_killing_murray.pdf
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_eed80767558b43da86bbcba5a864489a.pdf?index=true
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_e543d40ff43a498b83f95573fa55b30c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/55af7275-01fa-4894-afe0-8de97dd6c977/digitech_jamman_manual.pdf
    • https://uploads.strikinglycdn.com/files/e81aaa3d-f4cb-4fa3-bf14-cdf1dff47e8e/lsu_football_parking_pass_lot_407.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_off00014c24.bin
edd2249008413ad6a6e6a67e3e9011aedc01b07182915ab5192590d2cf4d1b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C24 5144 bytes
font_01_sfnt_off00015db2.bin
0e0cd880d96180eead57a79d1109a5c637b0eba99053a4d1c79c55e89557206a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB2 11904 bytes

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