Malicious PDF — malware analysis report

Static analysis result for SHA-256 5592e10e562254d8…

MALICIOUS

PDF

74.9 KB Created: 2021-04-10 00:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73719ff75c54444ca622f57448106511 SHA-1: 67db6006d93125520eeb529f3783baf7e0132920 SHA-256: 5592e10e562254d831f648f876425ab011a38d4c00e4f6b7842346f4ee8c7f5b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to a multitude of external URLs, likely for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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://resalured.ru/strik?utm_term=are+ikea+frying+pans+oven+proof
    • http://prodson.fun/nolinupubug0ri29.pdf
    • https://lajidusok.weebly.com/uploads/1/3/1/0/131070852/866c062.pdf
    • https://lewixixidofuj.weebly.com/uploads/1/3/4/3/134393564/1812965.pdf
    • https://cdn-cms.f-static.net/uploads/4387244/normal_604944cd2b760.pdf
    • https://cdn.sqhk.co/menodotitit/fliiMge/riptide_gp_2_redeem_code_for_android.pdf
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5fd64725c1601.pdf
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/toxidukegobivumiba.pdf
    • https://cdn.sqhk.co/faxiwapa/hchhjdu/44799862506.pdf
    • https://binimejo.weebly.com/uploads/1/3/4/6/134665204/xuzowijuvebiv_fanesisev.pdf
    • http://servicesforsupport.com/talend_big_data_tutorial4408j.pdf
    • https://cdn.sqhk.co/kagofiwavum/bgjbgcI/commercial_pilot_jobs_utah.pdf
    • http://itawegan.space/free_black_eyed_peas_the_timeb8ybv.pdf
    • https://cdn.sqhk.co/xonoguduzob/3LibChh/vector_calculator_addition.pdf
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/6485159.pdf
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/6aa839f9e9af5.pdf
    • https://cdn-cms.f-static.net/uploads/4471703/normal_602509fc49e06.pdf
    • https://cdn.sqhk.co/gilubibawi/iKjjiie/transmission_electron_microscope_pictures.pdf
    • https://cdn-cms.f-static.net/uploads/4422163/normal_6062db971f83c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e483.bin
677e305a80e10957bcb7a16fd9c3104a202484f9ad1f0f3751cec42b2f2a8cc6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 5252 bytes
font_01_sfnt_off0000f690.bin
90a2a2a6cfb81d0fe77107409fd5a87bf3fc88d1aeb7614cfb3d034fe0d01c08
pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 11924 bytes