Malicious PDF — malware analysis report

Static analysis result for SHA-256 02985cdd06170412…

MALICIOUS

PDF

79.8 KB Created: 2021-03-14 15:28:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4294ba7ae46a76eb0f0d188c074e5916 SHA-1: 13eb4e3c2d8580141d76090f7890694328f3ca01 SHA-256: 02985cdd06170412709954753c2e848b86be8c1b89552b696546f152e7047553
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed for SEO spam and potentially phishing. It contains numerous external links, many hosted on disposable domains, aiming to redirect users to various PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to drive traffic to malicious sites or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://seumenha.ru/award?keyword=bsc+1+year+botany+book+pdf PDF link annotation
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/lijenil.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/h7dijnZ/dinosaur_zookeeper_games_free_online.pdfIn PDF document text
    • http://kulokozataxat.22web.org/fiwozop.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuwitide/owihUhi/zemonefodefebofevito.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/j8eUohh/jilapumaka.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/fuAjjhd/vuvuzupope.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467306/normal_5fe0587e95a92.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/657a5df7.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/Njb47Tv/69049252557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505096/normal_604a816e2ad24.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/bjgIicU/nowitadilomexilufum.pdfIn PDF document text
    • https://cdn.sqhk.co/rabovafom/fCgshek/lagalowajugulimufabuxe.pdfIn PDF document text
    • https://mimedotaxejibi.weebly.com/uploads/1/3/0/8/130873786/nisetu.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/4729955.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/xerenirugawaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_098ad303746649e2a6866d2a36d01d51.pdf?index=trueIn PDF document text
    • http://kezuxitejapub.epizy.com/xavovejogoz.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_efa5b0c7af1d45d0acb3e9c0de1285d7.pdf?index=trueIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_62434bc374b54fceb8c95986b7053757.pdf?index=trueIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_36c72c892ea74fa8a23a04892fdda2b9.pdf?index=trueIn PDF document text
    • http://taxivufiwe.rf.gd/super_mario_bros_main_theme_piano_sheet_music.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_off0000edc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 5524 bytes
SHA-256: d9fc4e7de3769ded4993f425a725261df4e15f4c5233cb10c2eedb8f3458af58
font_01_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 3204 bytes
SHA-256: 55635b50bad29c6b04cd9b4d5dd064b78be6c29eafc981c666da6fe4470a6799
font_02_sfnt_off00010da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA6 10536 bytes
SHA-256: c5dc471f88a400240f106afaed5c5fca77e68e895ba9bd411f6ba1ff57a4ae33