Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c3581b2549eda5…

MALICIOUS

PDF

72.0 KB Created: 2020-12-26 06:36:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa8ced0244c2b6f3317fadddd55dfdb6 SHA-1: 5390e7b068bd2122603f3f749d5f99cdf24501ef SHA-256: 98c3581b2549eda5884cc9de96f5d88bf1cd4971dc0164f82de5803377571ba4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely intended to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'pirate song lyrics' to entice users to click the external link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=pirate+song+lyrics
    • https://cdn.sqhk.co/goluxewimabu/Rl4iagd/penguin_pals_arctic_rescue.pdf
    • https://cdn.sqhk.co/wevexifimur/01cTcje/world_voicemail_review.pdf
    • https://cdn.sqhk.co/nopawuwam/gjhjgie/worst_game_on_steam_mr_beast.pdf
    • https://cdn.sqhk.co/melukate/eZihhfS/turning_radius_calculator.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dutimajizowa/omers_annual_report_2011.pdf
    • https://s3.amazonaws.com/zuwosil/liserorudegigovafegozoxuw.pdf
    • https://s3.amazonaws.com/rupatojuko/guvilifetemasij.pdf
    • https://uploads.strikinglycdn.com/files/bbe21dbc-97c0-4dad-b184-7d476af82803/82964703222.pdf
    • https://s3.amazonaws.com/bojafazes/indigenous_knowledge_systems_in_south_africa.pdf
    • https://uploads.strikinglycdn.com/files/549946a1-eb7c-4167-af1f-4398b096fd25/biodescodificacion_enric_corbera.pdf
    • https://uploads.strikinglycdn.com/files/90f50448-017d-497f-8b31-04fc4897387f/blu_studio_g.pdf
    • https://uploads.strikinglycdn.com/files/2ba0d032-5c31-43e0-8829-51270b81278f/39843490976.pdf
    • https://uploads.strikinglycdn.com/files/ec38d016-cc71-4bb9-90c0-bc07ae0aa3d0/kedamono_and_onomadek.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_off0000dce4.bin
2c06766283b682eafd5eb59ce831d63bb545cfd56fec33c455c1f66ca6621fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 5068 bytes
font_01_sfnt_off0000ee39.bin
da29f755553752deb41e785503f553e6b553ef91192a3cab2f2a776407959145		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 10912 bytes

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