Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bd11e6cb84ec9f…

MALICIOUS

PDF

76.2 KB Created: 2021-06-04 07:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b03817eefc5a8ce54f7ab367a707e6f SHA-1: d02a5c0de03d3cf5a0a06e6139732e80fbf3daa4 SHA-256: 03bd11e6cb84ec9f927214efc12e8039559f8ed651d5f603d13657b095be18c3
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. While no scripts were explicitly extracted, the PDF structure and external link farm indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://krisoc.ru/pbw?utm_term=what+is+arsenic+boiling+point+and+melting+point
    • https://static.s123-cdn-static.com/uploads/4381297/normal_5fcc9efac87d5.pdf
    • https://nategenuniko.weebly.com/uploads/1/3/4/7/134749174/4130ef9c6.pdf
    • https://vogavowaxataner.weebly.com/uploads/1/3/4/2/134266619/gafuwe.pdf
    • https://bizizavo.weebly.com/uploads/1/3/7/5/137502277/raruxasuxobitimawuzi.pdf
    • https://cdn-cms.f-static.net/uploads/4445118/normal_60167043bb53b.pdf
    • https://panodetis.weebly.com/uploads/1/3/4/6/134669877/fefomavopivi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://togiwuvoze.pbworks.com/w/file/fetch/144467496/gexexobasogefop.pdf
    • http://funinupun.pbworks.com/f/online_live_tv_software_free_download_for_pc.pdf
    • http://sisagexal.pbworks.com/f/porijoxuzu.pdf
    • http://likanegi.pbworks.com/w/file/fetch/144513111/jozibomudat.pdf
    • http://lekuzax.pbworks.com/f/nafibefived.pdf
    • http://wikitaxif.pbworks.com/f/realidades_2_capitulo_8a-8_answers.pdf
    • http://mumasenekera.pbworks.com/f/what_does_the_triangle_symbol_mean_on_dashboard.pdf
    • https://uploads.strikinglycdn.com/files/a92726b7-8f94-417b-bd8a-9a50d62369df/ergobaby_360_infant_instructions.pdf
    • https://uploads.strikinglycdn.com/files/5c638f06-8fa9-42e0-8bc4-5864db99bb3a/85404289030.pdf
    • https://uploads.strikinglycdn.com/files/80a50fbf-a567-4f12-8a93-21ab2897e9ef/4785604147.pdf
    • http://bofamawetodo.pbworks.com/f/kewawilawegukaleziwimas.pdf
    • https://uploads.strikinglycdn.com/files/2e6e675e-0c63-4072-a9c1-cc051a11fb98/best_beat_maker_app_for_android_free.pdf
    • https://uploads.strikinglycdn.com/files/8efe1570-2cc3-4f4c-b1e1-3fdc210432ce/nubimibatusisamed.pdf
    • https://uploads.strikinglycdn.com/files/7107426d-103d-4b49-952b-53774ce977d6/how_to_start_honda_power_washer.pdf
    • https://uploads.strikinglycdn.com/files/3f9edf94-979c-47db-99cf-78c70bb4a11a/inventory_management_process_flow.pdf
    • http://lakebimutep.pbworks.com/f/batman_arkham_knight_ps4_tips_and_tricks.pdf
    • http://tusoxefum.pbworks.com/f/dedodugafim.pdf
    • https://uploads.strikinglycdn.com/files/09d0c853-9974-4cbd-8ae5-c6c00e69bf88/77371109926.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_off0000ecbe.bin
5f4b7bee1f446f096824ac720ca91d0850430df17a47169922fbee9aad39862f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 5640 bytes
font_01_sfnt_off0000ffca.bin
9a0f2a97e7cdff71b489a31116afbacf0b21524422a1473cc631fdb90d9bddc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 10284 bytes

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