Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fd01c41f8a4cd7…

MALICIOUS

PDF

80.1 KB Created: 2021-06-11 17:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3d2b7eb0cd0fbd21a07793c020445715 SHA-1: 32dc2aa4a10c338689fc943f7a349fcd8d86f8ad SHA-256: 42fd01c41f8a4cd718e1732475b36b81c8365b223fb6c404940cb26d05102f88
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, contains text related to 'Wii sports resort pc download', suggesting a lure. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://medvor.ru/pbw?utm_term=wii+sports+resort+pc+download PDF link annotation
    • https://mevexifuk.weebly.com/uploads/1/3/5/3/135345040/vofaborugevo-midado-gavojed-sanoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_601229d3078a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_6058c9051104c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454164/normal_6059f57d7cbf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_6058b1a592d3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_5fd9aeda80126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492275/normal_60c278a60e79d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_60141bf9a20eb.pdfIn PDF document text
    • https://lafotasenobofow.weebly.com/uploads/1/3/4/6/134675597/5219562.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/595dc32a-4956-4ac1-bfeb-a02a6c0aa36d/problemas_economicos_mexico_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1ed317-b5cf-45a1-9553-17e5b5d8d0e6/lepadoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0aeca3a-19ea-44ec-b234-b211e2c76bbf/what_is_second_order_reaction_in_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de2c2857-911c-4f42-905a-d7752f37dbd6/79662027101.pdfIn PDF document text
    • http://gabumur.pbworks.com/w/file/fetch/144506856/the_giver_chapter_1-6_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f07f62-9181-4044-8d41-8375a169ec5a/44048372475.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/w/file/fetch/144634044/bewukapos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770529a7-62e7-4b2f-8785-f7c792b12cef/microsoft_dynamics_365_guides_preview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87d07ac-8eef-40f0-b175-9582c5160872/84227167572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff32be7b-685a-47ac-94ee-aa781d7d1751/difference_between_canon_600d_and_650d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b267ff-d85a-47c6-b30a-7f7c283d0093/26957383649.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_off0000eff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF1 3316 bytes
SHA-256: daa68913fc18daacd8fe991ab8b56f5ade8619ddf25863c5a2dd601c5fb53a1f
font_01_sfnt_off0000fbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 5172 bytes
SHA-256: 0d746f88461aca6d6be7a69a837d54afe2122eb6def83dd0d80af6e05b6d7bce
font_02_sfnt_off00010d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8F 10896 bytes
SHA-256: d306332f1bd1b21a5f5234347c69a9516e2f589a5f654750056d8667d0870613

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