Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ceaa5fb304a7b7…

MALICIOUS

PDF

83.0 KB Created: 2021-04-01 14:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 02199193daa108988666c2728ea6270e SHA-1: 1af0b8c94971c3eefdb7a682b192f7c0e2a1ba7a SHA-256: 46ceaa5fb304a7b73978ff526c5221969241bbef1453d05e9a5467622a69e0da
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wix?keyword=uc+browser+apk+for+android+tv PDF link annotation
    • http://fullhp.info/koxofotituwujamabovyaqz.pdfIn PDF document text
    • http://sodalabs.club/rixifaw9f8lo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470830/normal_5ffa6e89269d1.pdfIn PDF document text
    • https://muwikoli.weebly.com/uploads/1/3/2/7/132740525/760985.pdfIn PDF document text
    • http://linefofaxugedu.mywebcommunity.org/antiphospholipid_syndrome_2020.pdfIn PDF document text
    • https://tizonitiwu.weebly.com/uploads/1/3/4/7/134734793/2c3362c1e.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/dead_soul_tribe_someday1vt1m.pdfIn PDF document text
    • https://dutosagow.weebly.com/uploads/1/3/0/7/130775111/lawelelunitoroxadofa.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/73419186505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389793/normal_60417dd79e2e2.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/35707252006.pdfIn PDF document text
    • http://tertov.xyz/matemticas_financieras_1_jess_rodrguez_franco_gratisyakvu.pdfIn PDF document text
    • http://werenntaq.online/89040677304yth1p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450727/normal_600458482275b.pdfIn PDF document text
    • https://donagifiwududo.weebly.com/uploads/1/3/3/9/133985641/gorifefobebe_zozogojiko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_8ec7be221be44103954a1d1bf74e7a7e.pdf?index=trueIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_454ac0cf2eac4e81b471103d6cde98da.pdf?index=trueIn PDF document text
    • https://b9264059-5ce6-458a-812b-58b21e0c51d1.filesusr.com/ugd/9a3dc1_b928e3f626374a80ab4cd4b8e28da4c1.pdf?index=trueIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/vemisibulametut.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/ninerakebogoxufisewog.pdfIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_3469d52a12a642a487cf7dd23119ddd9.pdf?index=trueIn PDF document text
    • http://zudupaxub.myartsonline.com/71907836990.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_a9909647b3794c338e56852564bf47e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sesijesule/91851908135.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_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 5464 bytes
SHA-256: 885e5f1f3644363773e7cee114827d9434b75cdd0cd71958ca35acc6750bade0
font_01_sfnt_off00010123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 11516 bytes
SHA-256: f43f08394f11fdb7069153f02bd5adf3794445063017218175758a824b25e855
font_02_sfnt_off000127e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E0 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140