Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d95a5d069ace4f…

MALICIOUS

PDF

77.3 KB Created: 2021-03-21 00:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5087f0b86e8770da3eb464b427387a3e SHA-1: 08030d2181fa59eef81ae4beef57d3b6808b2eb3 SHA-256: 89d95a5d069ace4f89716e3d38750bad8e76893001f0b3240f3f7e9b1740f7cd
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. The embedded URLs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://jacksth.ru/award?keyword=active+passive+table+pdf PDF link annotation
    • http://bafiselavanebep.mywebcommunity.org/us_army_recruiting_office_puerto_rico.pdfIn PDF document text
    • http://sadovik.me/cooking_for_geeks_second_editionld1vm.pdfIn PDF document text
    • https://birugenok.weebly.com/uploads/1/3/4/6/134632973/8b9b2c.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/interior_design_colleges_in_dallas_texas.pdfIn PDF document text
    • http://pshcomonhere.xyz/daraz_apk_for_android_4._1._2jdnht.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/sakotewivasu_gubarabageku_notebito_tojaginuju.pdfIn PDF document text
    • https://nivirijimukavut.weebly.com/uploads/1/3/2/6/132681164/9937740.pdfIn PDF document text
    • http://digitalcalakk1.xyz/gobidemadkxh6b.pdfIn PDF document text
    • https://pukexomupuko.weebly.com/uploads/1/3/1/1/131164185/gudibomobaz_fadodoleza_xusuza_tufajupubu.pdfIn PDF document text
    • https://koludoselutak.weebly.com/uploads/1/3/4/8/134893798/02098.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/oracle_12c_19c_upgrade.pdfIn PDF document text
    • http://qrettalq.online/whirlpool_water_cooler_manual_whkmd10nz17h.pdfIn PDF document text
    • https://rijevolokawuja.weebly.com/uploads/1/3/4/6/134661742/revuzajuxifebimap.pdfIn PDF document text
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/bizefo.pdfIn PDF document text
    • http://timurberg.ru/reveries_of_the_solitary_walker_sixth_walkbzsfh.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/zosamotuwena_zarofirinelere_dofodarezug_moxagizodabi.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/nolexofamupanudadu.pdfIn PDF document text
    • http://cosmeteca.com/cd40175_datasheetemuo8.pdfIn PDF document text
    • https://sizuginoten.weebly.com/uploads/1/3/4/4/134490660/62e2b313.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/jafelaz.pdfIn PDF document text
    • http://canlisohbetim.net/61931392861dy2jf.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/dudajelawogobukomom6nyjy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_b1f33ef0d8d144ddbe6a8a3c2b81554a.pdf?index=trueIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_68151692c5cd4ddcbca5a7cfba7cd5d4.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_191bf7bc28d64db78ceb2cac8af8fc99.pdf?index=trueIn PDF document text
    • http://vekemelegewimo.atwebpages.com/23188611090.pdfIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_91a5ecd824ba431facc704d7b2d5b50b.pdf?index=trueIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_3099e51a3918486092586f0a1d2f8f72.pdf?index=trueIn 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_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 5240 bytes
SHA-256: 9f8b3b1162fc31f8c9a158b2f41eee69f40cda5ad0e296f31f57e46c84dc5a27
font_01_sfnt_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 10116 bytes
SHA-256: 4fec9173a0357834dacb2a75948d78c08c58386d9c4162a8dfa1f64374ffd012