Malicious PDF — malware analysis report

Static analysis result for SHA-256 95567151eb6ac645…

MALICIOUS

PDF

92.6 KB Created: 2021-04-15 23:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c8e3c8ef21bfb8f11cdac433ec65b198 SHA-1: d354ba60a07ee964bf8baf5ef91edebd7d6ab45d SHA-256: 95567151eb6ac645ff5d8072d1c191e73a2288ea02e450f8800a3ef6ae83e2d1
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 hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely delivered via spearphishing, designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/strik?utm_term=rebelion+en+la+granja+personajes+descripcion PDF link annotation
    • http://tejifepubodol.iblogger.org/what_is_the_salary_of_software_engineer_at_google.pdfIn PDF document text
    • https://remezimivof.weebly.com/uploads/1/3/4/5/134582621/nezuro.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/damutegakuvu.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/dd34347bf22ecf.pdfIn PDF document text
    • https://domenotupeloli.weebly.com/uploads/1/3/4/6/134685365/xakasonaxoxi.pdfIn PDF document text
    • https://wevabubuked.weebly.com/uploads/1/3/4/5/134584052/5585192.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/hihf8jh/most_beautiful_wallpapers_for_mobile_screen.pdfIn PDF document text
    • http://noxivivixuza.22web.org/49249316705.pdfIn PDF document text
    • https://sibanomo.weebly.com/uploads/1/3/0/9/130969588/e58e3cb3.pdfIn PDF document text
    • https://vesetiwavulajed.weebly.com/uploads/1/3/1/3/131381055/383292.pdfIn PDF document text
    • https://tupinikuwexopej.weebly.com/uploads/1/3/1/0/131070806/991ca.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/gimaw-xezufemapeju-bedoteziveb.pdfIn PDF document text
    • https://bitoxogosem.weebly.com/uploads/1/3/4/3/134386372/1122473.pdfIn PDF document text
    • https://cdn.sqhk.co/bumegukomuza/lrPaKhb/iteration_gcse_maths_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/xawuboma/5jdsfgf/xabiviledanisexozofo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/aa979721-1cd8-4e07-aaec-7bdeda783199/finding_x_and_y_intercepts_worksheet_day_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3213853c-637c-478d-954e-2fc8af5c8dea/meziwajidikuboxalodom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8dbd4f5-f448-4959-9b1d-f22390b184d4/35925630186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51ffbe0-1fda-4b20-9741-691268e12994/duwujegekowanetaf.pdfIn PDF document text
    • http://waxusumuguk.epizy.com/scrying_sheets_magic.pdfIn PDF document text
    • http://foweroboxufafuv.epizy.com/94389269864.pdfIn PDF document text
    • http://xumuturil.epizy.com/hokkaido_tourist_map.pdfIn PDF document text
    • http://volozixoxogibe.rf.gd/wadajifebukapilafimeneja.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7C 5172 bytes
SHA-256: 4442b046286bc9c808f17054af54e2e1cfe756857ef816b79375f7630287e2ef
font_01_sfnt_off00012f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0D 12328 bytes
SHA-256: 3902562bd12d06e4deef65e418d64def39a13b31eaa74bebbf118328e2419b10
font_02_sfnt_off000156af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2