Malicious PDF — malware analysis report

Static analysis result for SHA-256 5825e6e902d7fae6…

MALICIOUS

PDF

75.4 KB Created: 2021-04-04 21:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02c1d5810dae82bca459b1b1446398c3 SHA-1: dd0a1619f0a382f25b65c7a1042440880559134f SHA-256: 5825e6e902d7fae63658c7404996164d2d4480705e10442dd16e47581ecdbf0e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one pointing to zajinet.ru, suggesting a link farm or redirection strategy. The document body, though partially corrupted, references 'seroma formation after liposuction', likely a lure to disguise the malicious intent of hosting these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/123?utm_term=seroma+formation+after+liposuction
    • https://static.s123-cdn-static.com/uploads/4387808/normal_6005448d29552.pdf
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/gubanaxeneranikuxut.pdf
    • https://gutoserenenew.weebly.com/uploads/1/3/2/6/132681448/d10e2e658.pdf
    • https://cdn-cms.f-static.net/uploads/4449630/normal_603be7eba2f19.pdf
    • http://pubgmobiie.com/strong_curves_vs_glute_labbq82p.pdf
    • https://bunofavaluz.weebly.com/uploads/1/3/4/6/134661637/5080371.pdf
    • https://cdn-cms.f-static.net/uploads/4383321/normal_604184df95c85.pdf
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5fd611ef113ca.pdf
    • http://educationonline.website/70054227566conpe.pdf
    • https://cdn-cms.f-static.net/uploads/4366620/normal_606330411a9e9.pdf
    • http://rejavufego.22web.org/37367435262.pdf
    • http://otshelnik.net/5622690906000hit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xezujuxoz/general_science_reviewer_with_answers.pdf
    • https://s3.amazonaws.com/pibajuwi/67093652887.pdf
    • https://s3.amazonaws.com/sagotomagin/a_storm_of_swords.pdf
    • https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_f855ec174271477ca4179a902d86afff.pdf?index=true
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_acc34d8656a2499fa1cbf21c82a30621.pdf?index=true
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_34c66dd0cd4d4cbba4910a8ca02f943b.pdf?index=true
    • http://nuwumexuxesi.epizy.com/7864059699.pdf
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_4ee9197b9f7949179a8ecf7770b311d1.pdf?index=true
    • http://femimiwavexu.epizy.com/ralabapo.pdf
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_b9e1fdd6bed6485abaae8fb513f455bb.pdf?index=true
    • 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_off0000ea25.bin
fc0b62756a639b7f3beb6c6fdd15d49968e45b358e3af6cbc2d3c7daa9e1868a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 5264 bytes
font_01_sfnt_off0000fbf3.bin
0a515a1e6f31493f2424f7ece8fa32066f197a93d2cc51b721e22f08ebef7ea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 10152 bytes

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