PDF malware analysis — malicious · 05230b9b25d60dcf

MALICIOUS

PDF

71.7 KB Created: 2021-03-22 15:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: d27775f7e514a86d93abb422e295c6d6 SHA-1: 12ca1137f3cc7781eb1a3efdf77f8c2d86644c2b SHA-256: 05230b9b25d60dcfd1ff560186ca3d4dfed2cab116193c90fbaf89af70718dbc

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. Heuristics like PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM strongly suggest this malicious intent. The ClamAV detection and ML classifier further confirm the malicious nature of the file, likely serving as a lure for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/strik?utm_term=what+if+the+scale+factor+is+negative PDF link annotation
- http://freehookup.xyz/wiwowulopamafakunuvejlq7.pdfIn PDF document text
- https://cdn.sqhk.co/vofosutuwo/hdgfUge/53194361926.pdfIn PDF document text
- http://zootime.store/pokemon_shield_iv_breeding_guide7irox.pdfIn PDF document text
- https://cdn.sqhk.co/xojelumegasi/o9Hjihf/shark_attack_hungry_wolf_bbq_denver.pdfIn PDF document text
- https://damifijaju.weebly.com/uploads/1/3/5/3/135340341/bukoxatudaxi-sukudaw-kenogerevito-datofurowi.pdfIn PDF document text
- http://jojazinex.mygamesonline.org/learn_korean_workbook.pdfIn PDF document text
- https://cdn.sqhk.co/lixipadiwel/jdXBiau/doom_eternal_ancient_gods_price.pdfIn PDF document text
- http://steh-sistem.ru/loha_movie_full_hd6iqtb.pdfIn PDF document text
- http://salet.store/nurgle_blood_bowl_set_uprz7br.pdfIn PDF document text
- https://cdn.sqhk.co/liminekaj/fd7Dnj9/80998649864.pdfIn PDF document text
- https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/pupetu_noxaruxagagonat.pdfIn PDF document text
- http://fejavodexata.getenjoyment.net/loxudej.pdfIn PDF document text
- https://lotekine.weebly.com/uploads/1/3/1/3/131381428/rulopajaluzalosib.pdfIn PDF document text
- http://mybiol.site/old_dryer_sheet_uses9so0f.pdfIn PDF document text
- http://item-get.top/20172000783yyjpo.pdfIn PDF document text
- https://cdn.sqhk.co/feletitami/oiaAjgR/sinister_night_horror_survival_adventure_games_ps4.pdfIn PDF document text
- http://krokoboko3.xyz/where_to_buy_house_of_night_series5jlmd.pdfIn PDF document text
- https://vimumigejanamim.weebly.com/uploads/1/3/4/6/134619591/taxejarogulew.pdfIn PDF document text
- http://podeves.xyz/20363481510gurti.pdfIn PDF document text
- https://cdn.sqhk.co/fezivabuja/ecs5gfo/72815695592.pdfIn PDF document text
- https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/tuditizafo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://futakanawus.onlinewebshop.net/lenovo_thinkpad_t430_car_charger.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_off0000cf60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF60	5004 bytes
SHA-256: `d8a0b6560f101f5c085301fee5f447a7e8ec19ae2c05bf03c4e13351a663b228`
`font_01_sfnt_off0000e068.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE068	10212 bytes
SHA-256: `980e64e6c67388f10da97517840908b82412072dec864096ccb8b6942df3d268`
`font_02_sfnt_off00010334.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10334	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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