PDF malware analysis — malicious · 2baabde4faa5b1e3

MALICIOUS

PDF

80.3 KB Created: 2021-09-19 05:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 565e0eede246354ef8b1ad53432a9735 SHA-1: a166cb23aa8114b3cbe28e1c048bc847897afd18 SHA-256: 2baabde4faa5b1e321f822b347f0fec202269cfaf681e602c02ac138334a734d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of ML_NYX_PDF_MALICIOUS and ClamAV detections, along with the 'Fake invoice / payment lure' heuristic, strongly indicates malicious intent. The embedded URLs are likely used to download a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://ketchas.ru/uplcv?utm_term=sam%27s+club+apk PDF link annotation
- http://promocode.lu/userfiles/files/23195841636.pdfIn PDF document text
- http://kpotplace.com/uploads/files/ditodupikixuxawevafa.pdfIn PDF document text
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea02ae73e7---zuxadivezivufagedobafup.pdfIn PDF document text
- https://patoman.ro/ckfinder/userfiles/files/5027407873.pdfIn PDF document text
- https://rowsontw.com/shopadmin/upload/files/7793041543.pdfIn PDF document text
- http://www.childofafrica.org/media/userfiles/file/vogasolikifapububo.pdfIn PDF document text
- https://altstudio.be/app/webroot/uploads/file/vabovowiviromago.pdfIn PDF document text
- http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/f83227203ea0b4a452f4793a39fc1233/kigobopebinemid.pdfIn PDF document text
- https://egf.tw/test2/images/file/xuronekajurumo.pdfIn PDF document text
- http://iburgisidimarsala.eu/userfiles/files/jerakumesi.pdfIn PDF document text
- http://ladyvenus.it/userfiles/files/gufemewofefoxutadub.pdfIn PDF document text
- http://gartenbaukoeln.de/uploads/files/malerorodinenisolomopop.pdfIn PDF document text
- https://christianklein.eu/Quansis/ckfinder/userfiles/files/jidilifu.pdfIn PDF document text
- http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/suzakesij.pdfIn PDF document text
- http://kietminhrivet.com/upload/files/92111592760.pdfIn PDF document text
- http://sanyosushiglendora.com/uploads/files/kejipiwarekiwali.pdfIn PDF document text
- http://security-m.jp/tool/images/file/xidikos.pdfIn PDF document text
- http://bsp-plovdiv.org/ckfinder/userfiles/files/rakavorisusir.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/246d5386c9dfb31f8480d5496f7f278d/fefilumotobupavam.pdfIn PDF document text
- http://duhochoangthanh.com/upload/files/2529986798.pdfIn PDF document text
- https://maintogelonline.bet/contents/files/jezafosefaviviluwopiw.pdfIn PDF document text
- http://montesantangelo.it/files/files/62832985636.pdfIn PDF document text
- https://dragonexpressml.com/userfiles/files/dezuzefela.pdfIn PDF document text
- http://fecoil.com/userfiles/file/labegowovuf.pdfIn PDF document text
- http://tichdiem.surecare.vn/uploads/userfiles/file/22537991516.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d6b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6B5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eecc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEECC	10328 bytes
SHA-256: `090af0525984f58f5a4651daa23c643afdca86570bbec00c435e5eef30d4b022`
`font_02_sfnt_off000105e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105E8	17836 bytes
SHA-256: `93b783d8dcd743ebf809a02ce387e53a54f628486ac0b82ecc9fd1e8d75c167b`

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