PDF malware analysis — malicious · bd8ef8f2cea325d8

MALICIOUS

PDF

91.8 KB Created: 2021-05-01 00:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: d9baff27fda7d7cb0d7752502a8cb3d1 SHA-1: 10c4e40b025cf7ad88d677568f1fac920c6e5748 SHA-256: bd8ef8f2cea325d8a2504ace4b8037bbb8283158e902bee55010c83ef3fe86e8

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically phishing or trojan activity. The presence of embedded URLs suggests an attempt to redirect the user to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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 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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://druttle.ru/strik?utm_term=labview+core+1+exercises+pdf PDF link annotation
- http://zugasanuko.getenjoyment.net/fukuxojipivenotelenux.pdfIn PDF document text
- http://ehaberdevlet.com/fosegorubolidopeja7mxm3.pdfIn PDF document text
- http://inter-kalinka.ru/chapter_3_settling_the_northern_colonies_vocabularyk324a.pdfIn PDF document text
- http://solent.bar/u_n_d_p_ki_full_form0qkvz.pdfIn PDF document text
- http://jedusajinud.mygamesonline.org/introductory_statistics_prem_s_mann_8th_edition.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405904/normal_60554b008bfb1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386851/normal_605aeb86ce775.pdfIn PDF document text
- https://cdn.sqhk.co/bodorosuzuta/YQjhgIb/queen_bedroom_furniture_sets_near_me.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471682/normal_60150eadd8e81.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423453/normal_601136217f3ec.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412568/normal_600cf4761b82b.pdfIn PDF document text
- http://rawitotizoxuk.scienceontheweb.net/piguwizaxuwugifu.pdfIn PDF document text
- http://zedakobogesa.mypressonline.com/80397982596.pdfIn PDF document text
- https://cdn.sqhk.co/xiroxozalal/hbeoku0/wallpaper_4k_pro_players_fire_free.pdfIn PDF document text
- http://fortuneo.biz/space_shuttle_images_hd7mbo0.pdfIn PDF document text
- https://cdn.sqhk.co/leluforeref/ijDihif/cod_recipes_grilled.pdfIn PDF document text
- https://cdn.sqhk.co/bilejufikone/mShfS6f/wugijobamebivegujeriwu.pdfIn PDF document text
- http://useporte.xyz/pebble_watch_app_2020ndg3z.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4474448/normal_604adc3e60e4b.pdfIn PDF document text
- https://cdn.sqhk.co/dibirolinu/nWjdicR/bofunimevapamevokuxumofu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4459788/normal_5fde327cbed32.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://widifusi.myartsonline.com/jusulijikuwul.pdfIn PDF document text
- https://s3.amazonaws.com/geradi/vuvubewusiriwidibo.pdfIn PDF document text
- https://s3.amazonaws.com/dupula/zamulopon.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00011e87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E87	1728 bytes
SHA-256: `071e35b4774d226c89bbd10bef30110ecb094d3555517f0e29a727a4cc4785e2`
`font_01_sfnt_off000126a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126A2	5472 bytes
SHA-256: `90c9479c44e193036c1c803beb91b07c08dea90b6cd535cde5955175bbcae65a`
`font_02_sfnt_off00013968.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13968	11572 bytes
SHA-256: `b3b9b517ea94d1b441a97c6e8016ffc8aeada20f583a22a1db5e741d3ca2892c`

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