Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0ee4ae38b40a36…

MALICIOUS

PDF

90.2 KB Created: 2021-04-04 16:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63900e7c5517f8dc1ea3b4872eab64c0 SHA-1: c8ffc5ba5257c1a6966bb1867c91f592a1b39721 SHA-256: 5f0ee4ae38b40a367093959c8fd23a8ad141cecafd447a8197cba913d910faf9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://kuzutuzo.ru/strik?utm_term=what+is+a+historical+comparative+research PDF link annotation
    • https://cdn.sqhk.co/gaxobenona/ghfdhbI/zitin.pdfIn PDF document text
    • http://nububezobuto.22web.org/canon_6d_ii_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/pofevadamem/bf0vjfV/53224439322.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/igAjeic/jump_for_goalposts_2.pdfIn PDF document text
    • http://tobafiga.medianewsonline.com/por_carreteras_secundarias.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/demejijigavatuf.pdfIn PDF document text
    • https://wefojomoki.weebly.com/uploads/1/3/5/3/135389947/bazavebaredide-tirefavoje-vezivuj-nemivasewamoluk.pdfIn PDF document text
    • https://tupemewona.weebly.com/uploads/1/3/0/7/130775182/407955.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/jjjdibB/zig_zag_commercial_way_too_high.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/99475553488.pdfIn PDF document text
    • https://cdn.sqhk.co/fivuwunar/Qngjy8j/30786137139.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/gG3iiGi/51074326217.pdfIn PDF document text
    • https://xumejiti.weebly.com/uploads/1/3/4/5/134529375/vowawatira.pdfIn PDF document text
    • https://xejoxobufedad.weebly.com/uploads/1/3/3/9/133997298/4932092.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/gUhdujh/jesebowudubopitomu.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/ggagdl5/bike_game_free_download_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/WPqO9dq/46027418134.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/6Yie4gh/ryanair_boarding_pass_als.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/ic6jcHY/apowersoft_screen_recorder_download_for_pc.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/refoxujipe.pdfIn PDF document text
    • https://cdn.sqhk.co/pajubopolak/a5jjJii/pac-_man_and_the_ghostly_adventures_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/iWijlib/catecismo_da_igreja_catlica_gratis.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/tilujufapiwi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funizenobuwuka.epizy.com/xopuwixuzexumimezi.pdfIn PDF document text
    • http://woxutonugosafer.epizy.com/vevomoves.pdfIn PDF document text
    • http://wepogevadapafa.atwebpages.com/58136882372.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/what_is_the_order_of_jiu_jitsu_belts.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_off00011fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB0 5244 bytes
SHA-256: 08d3d3d9ec1c59588b9fc59bd7c55575a241686464555a97ecadcd8c13f331b1
font_01_sfnt_off00013168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13168 11828 bytes
SHA-256: 7a133de1a6157b0f2a7eda4dd14a637aa8a53c702aac0b22c89b78b28a10ef6d