Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afb30f4a34addf5…

MALICIOUS

PDF

88.7 KB Created: 2021-03-01 18:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 60cb5237929a74027da2544224c94f3a SHA-1: be5973fd5bf35171a58f0bbb7d7cb05e0aec2cab SHA-256: 8afb30f4a34addf586bef64c874b4dbe222f89fb28e5f56b44ff6315f471d55e
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs and the nature of the heuristics indicate the document's primary purpose is to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://zajinet.ru/strik?utm_term=can+a+landlord+break+a+lease+to+sell+the+property+california PDF link annotation
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/7ad289.pdfIn PDF document text
    • https://jaligudupu.weebly.com/uploads/1/3/5/3/135391073/rinelokisi_xusokotiv_xomexopevul.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/fLheogg/sakura_school_simulator_apk_version_1._036.pdfIn PDF document text
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/7091674.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/old_yeller_free_download.pdfIn PDF document text
    • https://durirumis.weebly.com/uploads/1/3/3/9/133999752/06476a29f22e4.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/9151816.pdfIn PDF document text
    • https://debugifepini.weebly.com/uploads/1/3/1/0/131070476/d9ecb1a5.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/jipowirije.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/cnS4Hgj/diy_ideas_for_bedroom_storage.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/SchdgiQ/8520831715.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/ieihhbh/mafimopipalokijukukito.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/7979700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5fda18376fd24.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/nogukotux_dumip_golunoredut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/remuv/serik.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/69965406869.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/maze_runner_cast_dancing.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 5452 bytes
SHA-256: c2c7c22b4cae076a7e75749b3294dc41b30aacdfe61d3bee23812128a3624f67
font_01_sfnt_off00012ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFC 10832 bytes
SHA-256: b936e8525d8f49f8c38c8a506084308e84cf2e2ca8d8e6693a005334a142cdb2

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