Malicious PDF — malware analysis report

Static analysis result for SHA-256 2429c3c73a9c035a…

MALICIOUS

PDF

76.6 KB Created: 2021-04-18 13:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e31627794ee95faad71702a6a5061787 SHA-1: edd4fec7f199428bfb1dbcfb7bcf76811dbbd62d SHA-256: 2429c3c73a9c035abe2da82aaac75f3438cb575d2f7251fc46a2cb2ce4438ab2
126 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm. The primary malicious activity observed is the distribution of these links, which likely serve to direct users to potentially malicious content or for SEO manipulation. While no scripts were extracted, the presence of numerous external URLs suggests an attempt to lead the user away from the current document, possibly to a phishing site or a malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • 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://jumiwimov.ru/strik?utm_term=is+there+another+book+after+written+in+my+own+heart%2527s+blood
    • https://cdn.sqhk.co/lesebonun/r7hfbii/37_marble_solitaire_solution.pdf
    • https://kuvikopar.weebly.com/uploads/1/3/4/8/134870245/nikabax-tudagojodilamo-duzile.pdf
    • http://gnoogle.site/lenerisevagidizavamusubokur0rt.pdf
    • https://jigotofobab.weebly.com/uploads/1/3/5/3/135300724/058aca3abe.pdf
    • http://nudistoff.club/zomivasukexusokosisavakoikjiw.pdf
    • http://shoop-fn.ru/pacific_volkswagen_service_department3zh4z.pdf
    • https://xijeruwenuvu.weebly.com/uploads/1/3/4/0/134018409/fusima-jilota.pdf
    • https://cdn.sqhk.co/nupozifulija/ji0ggjC/converting_between_metric_units_worksheet.pdf
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/9630986.pdf
    • https://cdn.sqhk.co/norejasiwiza/iyvuVji/anime_live_wallpapers_mac.pdf
    • https://nutagabe.weebly.com/uploads/1/3/5/3/135325028/kewubepiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_292e8379f0a4401b855fe4d96e9ec578.pdf?index=true
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_f4818d9a85ce445193f2570eedcf2c54.pdf?index=true
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_c91faacd3bf84b2593bdfce47e1d6dd0.pdf?index=true
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_101dfd60dd1b4a209d2f46e5d2ee44bb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/46a4b80f-821f-4341-a52b-28aab2f75518/how_to_change_time_on_casio_watch_aq-s810w.pdf
    • https://uploads.strikinglycdn.com/files/414ca4c5-5715-4ad4-8cf4-ec957c94b744/80424336292.pdf
    • https://uploads.strikinglycdn.com/files/0d5e7406-cf3b-4223-a2e0-7c2d3107130e/major_scale_guitar_chords_chart.pdf
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_b70edf9fc2ce4389a59a85d37719a16b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dfd9278b-1673-48f6-8b01-9bc023c628bd/86974497995.pdf
    • https://uploads.strikinglycdn.com/files/5ed3e336-82b5-47d1-8182-dd4c0e93e11b/how_to_score_reading_fluency.pdf
    • 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_off0000ece6.bin
e93a7b0a03736870c989735ec4389d477504f64ed0522bf20ee3dc82ba5365c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 5516 bytes
font_01_sfnt_off0000ff9c.bin
9aef6d99ea96a409a8d3683f0dd61802b994ae0ca2734bb7b432faff14eef81e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 10852 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.