PDF malware analysis — malicious · 296cc3bac1b849c3

MALICIOUS

PDF

82.6 KB Created: 2021-09-04 07:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 7d1a0c0bfe521781e8cf6f478db6397b SHA-1: cb7f665293cc0e4e509878a6678f9afedf427e8f SHA-256: 296cc3bac1b849c3cfcfcaa06760f52fc8a9f523a0b20346b3673a396d22dfd7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs indicate an attempt to lead users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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
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.
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://wastran.ru/uplcv?utm_term=bsnl+up+east+plan+pdf PDF link annotation
- http://jinanxintiandi.com/userfiles/files/76319820793.pdfIn PDF document text
- http://www.annaleehuber.com/content_files/file/49279427211.pdfIn PDF document text
- https://ekransamara.ru/files/tefevebepos.pdfIn PDF document text
- http://xaydungphongphu.com/uploads/files/80907411228.pdfIn PDF document text
- http://szamosiszerviz.hu/feltoltott/files/47554069095.pdfIn PDF document text
- https://shop-ecobati.com/medias/upload/files/jagize.pdfIn PDF document text
- https://anmoul.com/userfiles/file/68954303064.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/36e01c527eab9350201a6e59c614e7b4/timawowonipuwabivexumenu.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/803f95bec80257dc52d24f64666d9004/lovasix.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/264829afa1c8c3851c88949fef1d83a5/78700222283.pdfIn PDF document text
- http://suankaew.net/upload/userfile/files/xidimaliromidavunanizotur.pdfIn PDF document text
- https://milosislandrooms.gr/userfiles/file/52242337827.pdfIn PDF document text
- http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608531e83feef---wofejiwenewimegawulu.pdfIn PDF document text
- https://pasarant0g3l-turbo-h1t.com/contents//files/37805434719.pdfIn PDF document text
- http://www.leposeur.fr/site/upload/ckfinder/files/71577376038.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/36472091283.pdfIn PDF document text
- http://nsfeed.com/_UploadFile/Images/file/mogubufewafikakozesapi.pdfIn PDF document text
- https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080d71c25860---45213371958.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/78906014300.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7038548b84---zudedativid.pdfIn PDF document text
- http://palestraarkadia.it/userfiles/files/19411435684.pdfIn PDF document text
- http://charivne.info/images/file/31635495451.pdfIn PDF document text
- http://mg001.cn/upload_fck/file/2021-5-10/20210510025305809174.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c3402d983---kulifoxat.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/8014427fe37f4ecfe37c84730caf8e57/45334843598.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_off0000deaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEAA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f6bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6BC	18084 bytes
SHA-256: `f3e541446d2ddd91682d8854a6bcc4cdc045192de531e0db93475833b15a240d`
`font_02_sfnt_off000125a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125A8	10332 bytes
SHA-256: `e3183f973eafe6b88dc584bba27044936e3a26fb0f04398c20718371d0f74b64`

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