Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbb49fc3a28abf6…

MALICIOUS

PDF

74.7 KB Created: 2021-04-08 10:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 448b36944033be552a8105abbfe4420b SHA-1: df0c6321a7c8421fdb1a13d3616229e79fd6f065 SHA-256: ebbb49fc3a28abf6ddbdab5acbcfd54080722ed0c984f7b5f6d9a44c2fbe2b7b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a significant portion hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs further supports the attack pattern of luring users to external sites.

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/123?utm_term=aether+portal+mod PDF link annotation
    • http://rezumitisud.mygamesonline.org/arteritis_takayasu_adalah.pdfIn PDF document text
    • http://devedilazabu.medianewsonline.com/lithium_ion_polymer_battery.pdfIn PDF document text
    • http://zalewef.iblogger.org/autobots_in_transformers_1.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/bibelot_dfinition.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/6IhgMhf/network_marketing_business_opportunity_in_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/jeTicSb/lemonade_social_enterprise.pdfIn PDF document text
    • http://fuxutigox.mypressonline.com/solid_liquid_gas_worksheet_grade_3.pdfIn PDF document text
    • http://talemine.getenjoyment.net/bahishti_zewar_bangla.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/5668499497.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/57668870785.pdfIn PDF document text
    • http://zitosobuzozuz.22web.org/how_to_rearrange_pages_in_adobe_reader_xi.pdfIn PDF document text
    • http://gemotebefid.22web.org/mini_international_neuropsychiatric_interview.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nofolimuri.myartsonline.com/vimofilaboredi.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/math_comments_for_report_cards_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/31575471964.pdfIn PDF document text
    • http://jokajejuti.atwebpages.com/ccna_practical_studies_cisco_certification_training.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/cipherlab_rs51_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/72139531845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5327c3e-7284-4691-9bd8-8b3b164bdfd2/61924691470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50fbfecd-91a1-418b-b586-324869fc4525/5839114040.pdfIn PDF document text
    • http://zotubune.myartsonline.com/libemedesikaliba.pdfIn PDF document text
    • http://xupozivuruvuti.rf.gd/bolakovutuguvebumeturif.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AF 5008 bytes
SHA-256: 8df9bbdb0af474f2e52df0b2a2f6df6a88a9ceef31821b6f0b423ccad8309f1d
font_01_sfnt_off0000e486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 10132 bytes
SHA-256: 9a8cc977b8200bf4c76ca67efe19f283c8864d80ed6c43ce0c8bad46b4a5d143
font_02_sfnt_off0001077c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077C 16064 bytes
SHA-256: f7fb55aa7df24da556f1e6a14ff3e973b5c7274e6851c040e899454d18355684

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