Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1937fa9420473f…

MALICIOUS

PDF

73.4 KB Created: 2021-06-01 05:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91db017539840ea734dc658358da500a SHA-1: 159acd9400c6d316292f72b0dae8251b00e51da3 SHA-256: ee1937fa9420473fcafd8bef6199aada838cee6e7bb9c729cdab191b6f218366
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing numerous external links, many of which point to other PDF files. The primary URL suggests a lure related to 'Gta 5 money cheat online xbox one', indicating a potential phishing or scam attempt. The presence of a 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious classification. While no scripts were explicitly extracted, the structure and heuristics point towards malicious intent, likely involving redirection or hosting of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/pbw?utm_term=gta+5+money+cheat+online+xbox+one
    • https://cdn-cms.f-static.net/uploads/4407795/normal_6067399c67e11.pdf
    • https://jononosafopobof.weebly.com/uploads/1/3/4/6/134649788/8088603.pdf
    • https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/806d26ecaa6.pdf
    • https://cdn-cms.f-static.net/uploads/4449424/normal_6035151977f40.pdf
    • https://cdn-cms.f-static.net/uploads/4420588/normal_5fe84e33455fa.pdf
    • https://cdn-cms.f-static.net/uploads/4388289/normal_6024aab65b3aa.pdf
    • https://cdn-cms.f-static.net/uploads/4462736/normal_605873207ede0.pdf
    • https://static.s123-cdn-static.com/uploads/4383916/normal_5ffa36b8e19ba.pdf
    • https://cdn-cms.f-static.net/uploads/4487208/normal_604a440beeaf0.pdf
    • https://cdn-cms.f-static.net/uploads/4379722/normal_60673f8f9065f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f582065a-ed24-456a-8259-158f7df533c6/34515186982.pdf
    • https://uploads.strikinglycdn.com/files/101c88ce-8225-4f50-b146-d4d77d736227/what_jobs_nutrition_degree.pdf
    • http://lekuzax.pbworks.com/w/file/fetch/144418746/how_to_put_onn_earbuds_in_pairing_mode.pdf
    • http://kelivesas.pbworks.com/f/rise_of_the_planet_of_the_apes_movie_download_in_hindi_300mb.pdf
    • http://siwuromo.pbworks.com/w/file/fetch/144425316/diferencias_y_semejanzas_entre_los_gneros_literarios.pdf
    • https://uploads.strikinglycdn.com/files/aa115dd5-0321-42bd-930a-5edd576f015e/wurizozuwafinerugotidazuj.pdf
    • https://uploads.strikinglycdn.com/files/f6c3cda4-5668-4f7b-bafd-3c91b6070dab/5102439858.pdf
    • https://uploads.strikinglycdn.com/files/ddce50b9-1401-49d0-ac3b-7d6a8797cdd4/43074656324.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_off0000e360.bin
d25d47a443ac921606369d9b316bff98670503842957aba0ce00acbff5afc5d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 5228 bytes
font_01_sfnt_off0000f523.bin
7e8c0a1077bfa188ff242670330bd43d5b455eea04603d3d9713a9fefdc940eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 10296 bytes

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