Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14d99d8528d92d9…

MALICIOUS

PDF

79.9 KB Created: 2021-04-24 00:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6c81a3d56c5443ffae4a0ac6278a9c57 SHA-1: 2f02a64fb174747079c5e9b8d19cf4b0f9ae13a6 SHA-256: e14d99d8528d92d9952f454aefd8eea4ac5f82e85f6abceabd44b8c488bb7d9e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/strik?utm_term=how+to+setup+netgear+n600+wifi+cable+modem+router PDF link annotation
    • http://mikovil.mywebcommunity.org/mary_douglas_purity_and_danger_1966.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/hc6idaY/monster_school_clash_royale_part_2.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/business_plan_for_online_shopping_website.pdfIn PDF document text
    • http://wenatal.getenjoyment.net/xinokafidumupigefafawow.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/sta-rite_pool_pump_owners_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417039/normal_5fcdddecd1037.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/gijBiyj/ninumevut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374710/normal_5fe3aa03ea5c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459036/normal_5fed2ddae8fa3.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/cpicsG4/marvel_contest_of_champions_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xanovixewin/ijLhfij/3888645652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_603e7970768be.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxofudaz/GJ4zyhb/halloween_stores_near_me_party_city.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaxesagujudiwa.epizy.com/gns_430_simulator_android.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/62996131152.pdfIn PDF document text
    • http://folujas.epizy.com/risuwaj.pdfIn PDF document text
    • http://xiwamunotop.rf.gd/9379278289.pdfIn PDF document text
    • http://foloxigosi.rf.gd/basic_networking_concepts_free_download.pdfIn PDF document text
    • http://gijaguvid.rf.gd/resolver_ejercicios_de_notacion_cientifica_online.pdfIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_552e5e2933324715ad0f78db03f96bcc.pdf?index=trueIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/what_are_the_5_operating_system.pdfIn PDF document text
    • http://kanusilos.epizy.com/indeed_career_guide_soft_skills.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_e0642e3985dd473b81895b27804f758b.pdf?index=trueIn PDF document text
    • http://reditavipesef.rf.gd/18654841112.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_bbc488a525b64074a3b788fa4985b4b5.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
    • 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_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 5964 bytes
SHA-256: 0aa75f7393e12cb51f89310bfa2843fda28fba0fabd7b604d3bb447fedffeb70
font_01_sfnt_off0000f5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AF 10600 bytes
SHA-256: 6dceb131f59c333ffa771a170cd69f3df1ab7962e5e3191f5db9f741fcbd9c5c
font_02_sfnt_off00011a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A21 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd