Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f34f822382075d…

MALICIOUS

PDF

81.3 KB Created: 2021-03-05 02:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c409ae3beac9dc9f8959e9a7b0cc67e1 SHA-1: d47a07dce85e4abde01785c85bf8b078f70cafde SHA-256: f9f34f822382075d085d933d070ce5880aaa5e45ccd09ffc41f79cc80e10c1d8
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm. The primary URL points to a page related to 'blood bowl 2 setting up a league', suggesting a lure to attract users interested in that topic. The presence of 30 external links, many hosted on disposable domains, indicates a malicious intent, likely for SEO manipulation or to redirect users to phishing or malware-hosting sites. ClamAV and ML classifiers also flagged this file as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/award?keyword=blood+bowl+2+setting+up+a+league PDF link annotation
    • https://kazusabetife.weebly.com/uploads/1/3/5/3/135318045/26c01f456ab8ff2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5fd041748a007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_6010c6de49e63.pdfIn PDF document text
    • https://lejawoxaniw.weebly.com/uploads/1/3/0/7/130738778/8948462.pdfIn PDF document text
    • https://japilulijerimu.weebly.com/uploads/1/3/0/7/130738614/1588737.pdfIn PDF document text
    • http://xubakonuxejebip.iblogger.org/english_kurdish_arabic_dictionary_free.pdfIn PDF document text
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/sinepuxalinogim.pdfIn PDF document text
    • https://lukazerud.weebly.com/uploads/1/3/4/3/134343231/saneboxufevet-fanurugiwalimek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5fdc433b7096e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd16a9d96114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_601990d98b7bf.pdfIn PDF document text
    • https://zabaruwizugode.weebly.com/uploads/1/3/4/5/134596412/sugadovudeja.pdfIn PDF document text
    • https://kodopexo.weebly.com/uploads/1/3/4/6/134693050/dirusuworijere_kasizujujeniwe_pisakotekanik_vikuzugo.pdfIn PDF document text
    • https://buvonumonub.weebly.com/uploads/1/3/5/3/135304713/4346363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_601add0116468.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/2157345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_5fe809a6edb08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/623fdf20-357e-4632-b198-a0bf6badc57d/sql_server_2008_r2_books_online_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baba4924-4e29-4358-a8e6-114159cabfa6/wisajumekubeniwe.pdfIn PDF document text
    • http://sowitid.epizy.com/49653958574.pdfIn PDF document text
    • http://nelifofufotilep.epizy.com/56288183123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf31ed23-e7ef-4cbb-a96b-0beea2e0606a/2348758896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76aaedc-e57e-4cd3-b439-3b985a30f7cd/kizezajoraxiwi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 5444 bytes
SHA-256: c8620aa90b59b6fb668af58a7b640481da4fb2eb87f0dc265b5a62d7be6aeea3
font_01_sfnt_off000114b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B2 10328 bytes
SHA-256: e25080049339a2613315847fdf4a366345d6333f2cb3e7493991f515395c5f53