Malicious PDF — malware analysis report

Static analysis result for SHA-256 95190d2b78d6fa7a…

MALICIOUS

PDF

73.7 KB Created: 2021-05-07 23:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e86c02f471b2665de6a3c9f187fbf861 SHA-1: 2b73567b55302e9feceb754635f99c13ba85e3a3 SHA-256: 95190d2b78d6fa7aceebc52a26fbaa0ed75d38d1650cdae88a86637fc5749777
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, indicating a large number of external links. One of these links, 'https://soxebez.ru/strik?utm_term=how+to+trade+options+on+webull+for+beginners', is suspicious and likely leads to a phishing or scam page. The ClamAV detection and ML classifier also strongly indicate maliciousness, consistent with a phishing lure.

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://soxebez.ru/strik?utm_term=how+to+trade+options+on+webull+for+beginners PDF link annotation
    • https://cdn.sqhk.co/vavusiwi/yjcgfTG/snake_and_ladder_board_game_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/nujekezitifi/fQLoXBK/game_of_thrones_map_wallpaper_hd_1920x1080.pdfIn PDF document text
    • https://cdn.sqhk.co/divabasom/6qjdJgd/62480441052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_5fd00663684d4f939ef3fce0e7c2ca97.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b08ca4a-60fd-4f36-aee4-8c78857addea/miss_peregrine_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a9bb83-a547-4340-961c-6ee1ff986c7c/jerarquizacin_de_valores_segn_max_scheler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca1c16c-b4d8-4d53-9091-664c86799927/motorcycle_diaries_book_malayalam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0fdcea-66ca-41b1-90a0-0357b8d2cc42/day_14_21_days_of_abundance_meditation_deepak_chopra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27025126-8b04-4b64-b4be-e771a922ee54/drinkwell_pet_fountain_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fddb583-66ad-4f14-85c3-ea366cb88b37/27418420481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0fe399-662d-44fa-b58c-ea2a4315506a/72965278833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25ed004-3adb-489b-bd36-72590a6bdbea/msi_n1996_gpu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f9ab2c2-0e8c-4d2e-a484-e82724ef407a/how_to_regulate_temperature_on_brinkmann_electric_smoker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1f1938-ccfe-4857-90dd-a0a6b6117276/zebusogufimotuxobuj.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/what_is_a_dialectical_thinking.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_f6a31b8d9ea1460a8475c9728f6332c0.pdf?index=trueIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_449f6dd245244a349e9a9a1848398a9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a1368d-f757-4b5f-b10b-fb18201c2d66/nora_roberts_books_in_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f87c19-f17b-4784-90a9-1cb850b670db/76605746003.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/30673398424.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_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 5404 bytes
SHA-256: 8de47feacbfd10ec42f202b967f8888dbadf16f04636374fc1b2c2c4adfb3539
font_01_sfnt_off0000f321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF321 10936 bytes
SHA-256: c779c0733cd4fdb9169fc19f6929a877093aa49668dfe01425b1c2ef666cccc7

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