Malicious PDF — malware analysis report

Static analysis result for SHA-256 552017c70ef7ddd3…

MALICIOUS

PDF

86.3 KB Created: 2021-02-22 15:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6a262e3f96b5bfcf6d9b76ceea9ea1cb SHA-1: 7b38e4b8a3ca25ad911e01995163ddfaaab0b9e3 SHA-256: 552017c70ef7ddd36dedbb6fd630d550ce421662b993910df65ad5ddf5cce961
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, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, appears to be a lure related to refrigerator issues, directing the user to the malicious URL. The presence of embedded URLs and the overall detection by security tools strongly suggest a phishing or malware distribution attempt.

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://jottigo.ru/123?utm_term=why+is+my+samsung+refrigerator+control+panel+blinking PDF link annotation
    • http://8gusevshop.website/zombie_world_war_z_moviei5wcc.pdfIn PDF document text
    • http://hangookoil.ru/67539127670dx4n7.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/2hdZnge/tigukabuzemijezowuvudima.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/BPUgdhd/novela_medicos_televisa_capitulo_2.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/ihhfVgf/dosatoxisevojejamomatiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/njbUegi/download_bubble_wings_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dinisemowoge/chlamydia_species.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/pneumatic_flow_control_valve.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/75614928328.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/giro_cycling_shoes_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/57611630830.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/how_to_create_email_signature_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/therme_vals_peter_zumthor.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/world_cup_cricket_2019_date_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/wamumikiref.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/chukar_mere_man_ko_video_status.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 5632 bytes
SHA-256: 5bc729be1805c7179feb783304d80d62cd8bc5e7dd712561ced7a6eacf6927a3
font_01_sfnt_off000118b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B9 10692 bytes
SHA-256: af2a7f9d7bfbc3a3a31a06fbfbc99ea68932e8013b51df8b8c9edeb49b9cacc1
font_02_sfnt_off00013d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D33 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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