Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c15d299847300d6…

MALICIOUS

PDF

78.9 KB Created: 2021-04-17 03:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a5b6e1651cecdf48c9deabb63733817 SHA-1: 787b110efe75fdc283bdff2b3c14c6c020dcddfc SHA-256: 4c15d299847300d6e5959d39f1b39033b43a742fb435d80e19f1735a3f3033d4
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, indicative of a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://resalured.ru/strik?utm_term=how+to+use+bose+700+remote
    • http://ravevuzovije.mywebcommunity.org/alphabetical_list_of_careers.pdf
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/7612443.pdf
    • http://kobivoweder.mypressonline.com/91106431781.pdf
    • http://tosefabebiribow.scienceontheweb.net/three_branches_of_government_rap_smart_songs.pdf
    • http://jojazinex.mygamesonline.org/behavioral_finance_psychology_decision_making_and_markets_download.pdf
    • https://bomobokoluv.weebly.com/uploads/1/3/1/4/131437025/2237024.pdf
    • http://lazirog.mywebcommunity.org/wawujatawusovejaseji.pdf
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/2256691.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1235b981-e201-4284-a997-5bbfa5e3d358/nesunaginezuzibi.pdf
    • https://uploads.strikinglycdn.com/files/a7612d3e-d09a-472b-be25-6f0545794ce3/wozosobid.pdf
    • https://uploads.strikinglycdn.com/files/99307d76-9756-48b4-b3b7-1d2fa946cbec/sofajamuro.pdf
    • http://kisalonokexiwi.atwebpages.com/color_code_branding_identity.pdf
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_db7f2f1d0c4245f5bf5bf6393cb2934b.pdf?index=true
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_9a04c46daa94424c8cad38e4cea4f781.pdf?index=true
    • https://4f0f5a39-0a2f-4cdf-b4e4-40a644fad8b9.filesusr.com/ugd/2024fe_1acf9899966f400dae8169fd4ee8c28a.pdf?index=true
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_c283f0e93eec456ca794f29c526517d5.pdf?index=true
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_9112958639cf4afa9414f39e0f08e73f.pdf?index=true
    • http://koxolavomuzo.myartsonline.com/alabama_abortion_law_free.pdf
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_fe5ceeef41774c1a9a20f090ffea5098.pdf?index=true
    • http://luregaw.onlinewebshop.net/6017079236.pdf
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_0a3987caf78d44f3aefeb35467a92173.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_off0000f7e6.bin
b42115a7de43c5eb5f5c1bb530e81fe162b6b7a51e08ccc0d4787080e8f3c3e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E6 5004 bytes
font_01_sfnt_off000108ec.bin
ccc3eef5f68e2314b3f39e33ea019bc146741586e7b0d16a62a598fbc5156322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 11068 bytes

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