Malicious PDF — malware analysis report

Static analysis result for SHA-256 491fd97cd79d88ac…

MALICIOUS

PDF

109.2 KB Created: 2021-03-08 23:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d3f5220474d3bc1ac6289775ecd79b1c SHA-1: affe8d50e1f24ddece8beca5d724c4d34fc26117 SHA-256: 491fd97cd79d88ac56f99b5988435e80d7fec3844bf94a077021ad42f97de66f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain text related to the URL's query parameter, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=what+is+the+best+vocal+effects+processor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461511/normal_5ff1dcabb1e41.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/nepifikasorim.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/CGiiiZ0/50911162874.pdfIn PDF document text
    • https://laxaxaxiw.weebly.com/uploads/1/3/4/5/134528460/49da41d31.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/8hhfugf/98800666571.pdfIn PDF document text
    • https://wovigapugup.weebly.com/uploads/1/3/2/7/132710676/4231050.pdfIn PDF document text
    • http://vkysnaya-eda.site/race_day_multiplayer_racingtq6do.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/18190926661gxfl5.pdfIn PDF document text
    • https://rogefuza.weebly.com/uploads/1/3/4/6/134688393/cd34ca32.pdfIn PDF document text
    • http://stnold.com/superstar_life_hackswblhf.pdfIn PDF document text
    • https://nabovuguxobe.weebly.com/uploads/1/3/1/8/131871891/02a8b9.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/Raciahg/woodworking_for_dummies.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/WhgfP0H/where_to_buy_real_basketball_shoes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_602cf70d02f44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_6029973a316b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c52baa1-8d01-45f5-a4d0-909429112dd8/67250680905.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/der_erlkonig_sheet_music_violin.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/59901941853.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/93858869679.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/what_is_basic_calculus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bcfedb3-1a94-4d2c-8491-79172248ac03/84403433217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132cc15f-2967-4d9b-9b4b-02b5d5312f77/samsung_bn59_remote_app.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D90 5316 bytes
SHA-256: 553fbb20c41b8db86bb1bcd6978b6f799cf4c4786bd3e9449be22a1252c215c1
font_01_sfnt_off00017fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FB3 11728 bytes
SHA-256: b40a3f39585437302251f5adf131b2d8ffc0c64f70d54b49023dd989cbf149e2

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