Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fdf0e7e00f1c1c…

MALICIOUS

PDF

81.6 KB Created: 2021-03-31 01:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4905ef156b71ff051b0bb1ed7cd541b4 SHA-1: bcae181b96578bb075a7a44a88f8c98b6dcedc96 SHA-256: 30fdf0e7e00f1c1c6c55cd42a89add03e64428bd4639f9bcae614cce95acae3c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing lure. The primary IOC is the URL https://botokaw.ru/award?keyword=animal+kingdom+coloring+book+pdf, which is likely used to redirect users to a malicious site. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://botokaw.ru/award?keyword=animal+kingdom+coloring+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416318/normal_602be115edbfe.pdfIn PDF document text
    • https://sekugiwa.weebly.com/uploads/1/3/0/7/130739582/6607027.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/i1vZr3x/mowumuninakawomome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_603c836dc3bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387050/normal_5fd67d5f466c1.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/dutaga_tenajetofamuge_zalulifunegiz.pdfIn PDF document text
    • https://cdn.sqhk.co/lakivasulis/jiYigij/xidediwexigi.pdfIn PDF document text
    • https://cdn.sqhk.co/wapisuda/hbheifk/manorama_calendar_2019_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/hgUgjXg/19694464749.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490375/normal_5ff3fb9585f14.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/vonutavekip/nudijupene.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/thin_bendable_metal_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409053ce-bca2-430f-a335-19d154d26eb6/mebezodabinukolokiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3698568-1194-4322-b48a-868d0243dae9/stm32f4_reference_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/17875562797.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/thermodynamics_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c6846f-23f1-4be1-b75d-df97514fcdd2/andrew_wommack_healing_school_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dcb5d75-9519-481c-8b29-361240fce811/what_is_events_and_causal_factors_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/cub_cadet_xt1_46_snow_blower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc989afd-6927-4152-b6d8-28735b1c41ea/die_unendliche_geschichte_film_fsk.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_off0000f12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12B 5080 bytes
SHA-256: 83c2a00539ed8c5471e9bac4f7168ff2820cfbeaf750acc8e0f45f5c6be1cc1e
font_01_sfnt_off00010238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10238 11728 bytes
SHA-256: d4b7f02ea6e5b4a75e21f51e82e47ab10894aa93ee7731df9575c4ca8e2133a0
font_02_sfnt_off000129a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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