Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f0f638fe852ae0…

MALICIOUS

PDF

72.5 KB Created: 2021-02-12 23:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5410d4346e79bfba98db18558a248f41 SHA-1: 039a3ea8c4bdb1941abfec70bbdbf9f5eb0887c1 SHA-256: c6f0f638fe852ae01aff9d3a2c1542251ebf8bbc21c4aa86188229048d6af415
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/123?utm_term=charter+spectrum+error+code+409 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fec3d6385d67.pdfIn PDF document text
    • http://reduslim-ordina.site/desivepzydou.pdfIn PDF document text
    • https://pudasebedizut.weebly.com/uploads/1/3/4/5/134587980/lelogibimokizalukup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_601e56ea920ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_60150d46b8908.pdfIn PDF document text
    • https://vedaputenada.weebly.com/uploads/1/3/5/3/135318287/zizesaf_wijuvapurokita.pdfIn PDF document text
    • http://ozalupa.space/arithmetic_series_word_problems_worksheet_with_answers709es.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485305/normal_6006a3d4d3b94.pdfIn PDF document text
    • http://immortal-sho.club/mongodb_university_m220_answers9hie8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407060/normal_5fddd838af2cb.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/2240378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459328/normal_5fe6e11e75426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_60109adf17b02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowuwivipi.rf.gd/zitukajasulogowubifena.pdfIn PDF document text
    • http://gezuvemun.rf.gd/60133549178.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/png_hd_background_2019.pdfIn PDF document text
    • http://pitupeg.epizy.com/beautiful_birds_hd_wallpapers_free.pdfIn PDF document text
    • http://pevubisexifizo.rf.gd/wheels_on_the_bus_song_mp4.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_off0000deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 5572 bytes
SHA-256: 5d7801e3150c84d48685d9bc1bc7b772edccb5e84632777e9702c950571b047e
font_01_sfnt_off0000f1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B1 10376 bytes
SHA-256: 4bf63d967f4bd69ad017d221a6b734db7ace9cc6b29df078be33df65a5e09881

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