Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a61829846adc4e…

MALICIOUS

PDF

85.3 KB Created: 2021-05-15 06:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b0c33ab5dbd2e1060e3f7cd525481a34 SHA-1: b281adcabb644bb9b225d4ce9e5b054de933858c SHA-256: 11a61829846adc4e69a9e2d500fbc1a88624a61e91f0a6bcc5251c5f87115e58
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm designed for SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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://xezojetit.ru/strik?utm_term=asus+m5a78l-m+lx+cpu+support+list PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486521/normal_605326c6f2dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_605a9faf94259.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwesedujila/aieAxih/kung_fu_tea_near_me_hours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447884/normal_5fd391196899e.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/where_to.donate_used_toys_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_60134b6b8d1ed.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/dinike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_606597ef5f7bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_6062ba74c606b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_605fe70d32ec5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455672/normal_6006f154a2367.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/jafebixavixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_6050d9730bfa0.pdfIn PDF document text
    • http://gixapedotamerow.mywebcommunity.org/76195735775.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/i728wjg/zozinixoxawerexero.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/barbecue_cookbook.pdfIn PDF document text
    • https://cdn.sqhk.co/zutujodara/Wgjpbii/31444839098.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fuvidokibet/ponox.pdfIn PDF document text
    • http://vidoniwofunevan.onlinewebshop.net/ginivowevutupovor.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/13281228768.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/formazione_professionalizzante_apprendistato_durata.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/2687001865.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 5224 bytes
SHA-256: def5d3308a73c418b32570ab81ee4e3948e61f1c02f5c7c17adc840967683b20
font_01_sfnt_off0001055c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055C 16984 bytes
SHA-256: 4bbc9bc7c5817aec3db07e81d0c457587811d9c416036eeeee3ea0274a9648f5
font_02_sfnt_off00013978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13978 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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