Malicious PDF — malware analysis report

Static analysis result for SHA-256 03615b943c489713…

MALICIOUS

PDF

90.5 KB Created: 2021-04-22 23:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 34c1f79ce971416a1fe02d1efdbb4338 SHA-1: b329ca14366ffec09ab2699ac9f8b8df40dbcd5a SHA-256: 03615b943c4897132c081a747483dce464df10e54b22412c84d038a261dc3fb9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure itself are indicative of malicious activity, likely related to luring users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=libro+once+minutos+para+leer+gratis PDF link annotation
    • https://cdn.sqhk.co/fafaviwi/dsgchh1/warlords_rts_strategy_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/jjWjifL/mubezoxulewolajoruwulo.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/cXifOia/torn_meniscus_surgery_cost_usa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1bccc061-d5d5-45a0-82cb-d48a2eec7d5e.filesusr.com/ugd/4d935e_0a8732dc64cb42c8b51b10d7d1684027.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wunojipu/what_is_new_in_microsoft_project_2019_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2a3788-4fdd-458d-aef5-e119ddd98122/the_wheel_of_time_book_1_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/67546955479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123c9d57-b208-4c6c-afef-338e9b91fb33/93455493249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9501c264-39d3-478c-9245-fbc92391b44a/88950777541.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/c_to_f_conversion_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21d44ec-a621-49dd-9efc-45d4619169ff/19210844700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38b946c-ef2a-4322-b3d7-4029d269814d/20657942196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63736e1d-a4bc-499e-b05d-5105c0abbd61/georgia_tech_online_masters_data_science_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/when_and_where_i_enter_quote.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/how_to_thread_a_singer_fashion_mate_5560.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/how_to_add_songs_to_eclipse_mp3_player.pdfIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_e60fdd328400421094a60ab75eb4894c.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AE 6548 bytes
SHA-256: 0b1dc5b4f573a69b9afaf6921dac0d317c9c89d55a369f9988057ef6dc1e612c
font_01_sfnt_off00011803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11803 5332 bytes
SHA-256: 36801a8b16255fef2e8d0231135ed1da2efec990f3a188963fe40bf1068b6d87
font_02_sfnt_off00012a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0A 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off00013297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13297 12228 bytes
SHA-256: ca5f58c0f40c90d600d5f6c143d4e658a4050c5997ebb6c4acdf4faba983b1ea

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