Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3e0fcbfbfd17cb…

MALICIOUS

PDF

77.7 KB Created: 2021-05-15 17:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4c27ecbec950bccefa31c9b97fefe12f SHA-1: 26fede535013911b7cff5f142c3d1704684bc229 SHA-256: 6e3e0fcbfbfd17cb3086a6314f91a7d3153cbdbd4d3576cb5d74f37eac9c95ab
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO spam or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful websites, aligning with phishing or malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=latin+of+life PDF link annotation
    • https://cdn.sqhk.co/xinulezebi/joUjhhf/27518130234.pdfIn PDF document text
    • https://tewizoduwab.weebly.com/uploads/1/3/5/3/135341898/02d606b73e1.pdfIn PDF document text
    • https://tusovaxurekugu.weebly.com/uploads/1/3/4/9/134900319/kavapola_wevonetije.pdfIn PDF document text
    • https://cdn.sqhk.co/novoganug/dT9iagd/boomerang_app_ohne_instagram.pdfIn PDF document text
    • https://tivulose.weebly.com/uploads/1/3/4/3/134318041/310e1e2cbdfc6.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/o3LigF9/car_parking_multiplayer_mod_apk_unlimited_money_ios.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/48685.pdfIn PDF document text
    • https://cdn.sqhk.co/makekajet/iigAOii/43940282663.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/iPhfihO/thornhill_park_master_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/nhfifqY/who_information_on_masks.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/vaperevexo-zipebosos.pdfIn PDF document text
    • https://cdn.sqhk.co/kiwikiza/ijjdqhi/chicken_scream_gameplay.pdfIn PDF document text
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/garapamubekotano.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/jig46hf/7643002033.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/iiLEjaQ/2013_safari_storme_vx.pdfIn PDF document text
    • http://dazenad.iblogger.org/alter_ego_a1_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_3d44059deb2d4af3ac818f5e07fa991e.pdf?index=trueIn PDF document text
    • https://67536400-2f23-40e2-9d3a-36ae3f4dfb8c.filesusr.com/ugd/5312ea_388fbe3abdf74b8fbbd4eae65638fd4a.pdf?index=trueIn PDF document text
    • http://vexibuwo.rf.gd/febig.pdfIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_f506a181a2504930966866e68ab45f9c.pdf?index=trueIn PDF document text
    • https://8aa13d94-a051-4bfa-911d-5e7c2f772018.filesusr.com/ugd/382cc4_b4725598adf2408aa08e0c4fcd3ab7b0.pdf?index=trueIn PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_5aa124c055884c4aa6cfe653d7b3a4f5.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_off0000f5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AD 4428 bytes
SHA-256: a6816680a8377abc9474ffc38cfa2282d4144d5db28079d831cd0a136615d7ac
font_01_sfnt_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 11052 bytes
SHA-256: 7927a88fd0adf52081d584165a4e4f0a4bbe06af14306ad22992e905b183bc00