Malicious PDF — malware analysis report

Static analysis result for SHA-256 b008de12915634c4…

MALICIOUS

PDF

82.1 KB Created: 2021-03-11 23:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8030cc264063c2d523c3407319df8bb9 SHA-1: 13472bf5c384e92c2bf9dea1adbdf697a7b9ca4e SHA-256: b008de12915634c4dc7568578675d76c4a51f9d791144a052e17fe8500195ce7
126 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The primary purpose appears to be SEO manipulation or distributing malicious content through these links. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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/wix?keyword=big+head+games+tennis PDF link annotation
    • https://cdn.sqhk.co/pigexebobe/jd8nQCd/99067875232.pdfIn PDF document text
    • https://nupowanekajotut.weebly.com/uploads/1/3/0/8/130815303/6927396.pdfIn PDF document text
    • https://pomonomiwubexi.weebly.com/uploads/1/3/2/3/132302815/selij_zazefejex_felewa.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/agf85je/the_adventures_of_tintin_2011_watch_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/PcB9jeK/63013773211.pdfIn PDF document text
    • http://xetorobexojukas.22web.org/pamegufeforedujisilanije.pdfIn PDF document text
    • https://tefovaxosu.weebly.com/uploads/1/3/1/1/131163863/21974.pdfIn PDF document text
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/vizogepagodo.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/jowuzejijaw.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/Eji74TQ/powijoletoweregobob.pdfIn PDF document text
    • https://xowesujitevenas.weebly.com/uploads/1/3/5/3/135321640/wosafevuwajamo.pdfIn PDF document text
    • https://kexowepapu.weebly.com/uploads/1/3/2/8/132815076/xosujo.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/gekexegov-zozazibapogogov.pdfIn PDF document text
    • https://tadesurirow.weebly.com/uploads/1/3/2/7/132711952/dusexaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapodivopabo.rf.gd/raees_trailer_hd_video.pdfIn PDF document text
    • http://fagewawejaso.rf.gd/portable_basketball_hoop_installation_near_me.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_5dd9f5df823d4171b06cc74fdce85bf0.pdf?index=trueIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_dafe975b957449f4a5f3484f291f2f54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/aakasamantha_movie_video_songs_free.pdfIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_e642aba54f9a4a90be846a8d9546ce9f.pdf?index=trueIn PDF document text
    • http://lajixowamimexo.epizy.com/is_mba_worth_it_after_30.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_698bcce11db742b2814f6aa8250b47a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulagisi/employment_leave_policy_in_india.pdfIn PDF document text
    • http://fasonanovetin.epizy.com/casio_sgw-500h-1b_review.pdfIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_828f2e3c8cbd4a10b9546a617db0922c.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_off00010474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 5160 bytes
SHA-256: 042965725bf8190e002fa3563eb06b833037fd6372ebba4cb12884f7e1f7606d
font_01_sfnt_off000115e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E3 10892 bytes
SHA-256: 2528e1108d2f9f1a76960d2ccecd22ac3a26c71aaaa1104d79a124ae252a93b4