PDF malware analysis — malicious · 7b8ac1bc86533aba

MALICIOUS

PDF

90.6 KB Created: 2021-09-19 09:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 3a9612ac878256ccac392587f5e61962 SHA-1: 40348242c7ab203e340c0326df05007200b6408c SHA-256: 7b8ac1bc86533abae9bc85fa86fb92cf4254451f89106db81cfa5d0b94cbcf51

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one specifically identified as an external URI pointing to a suspicious domain, likely for phishing or malware distribution. The PDF structure and numerous links suggest it functions as a link farm or redirector, consistent with a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://pixomot.ru/uplcv?utm_term=the+way+of+the+superior+man+pdf+free+download PDF link annotation
- https://senarathgroup.lk/assets/media/file/ropitamonutowomamilo.pdfIn PDF document text
- http://itineraire-consulting.com/ckfinder/userfiles/files/nonolujiwonasikeweriz.pdfIn PDF document text
- http://ahxxzx.com/userfiles/202109/file/tanimipeto.pdfIn PDF document text
- http://www.nagsa.es/ckfinder/userfiles/files/33134179387.pdfIn PDF document text
- http://sz-nuoyi.com/Upload/file/2021090604301318796.pdfIn PDF document text
- http://ux-school.ru/files/files/tokakupobojemekedexusawet.pdfIn PDF document text
- http://zgkimsteszew.pl/img/upload/files/90248448105.pdfIn PDF document text
- http://bitite.lv/media/txt/122/file/kejenatemofafarigu.pdfIn PDF document text
- http://brandiassociati.it/userfiles/file/neladatelewevilesuro.pdfIn PDF document text
- http://sun-tes.ru/files/file/besajupufirawuxurexuse.pdfIn PDF document text
- http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/1ae5cd4c843d87bfe9c986885383e92e/pijab.pdfIn PDF document text
- http://www.ciesol.es/ckfinder/userfiles/files/84578158696.pdfIn PDF document text
- https://zegaoyun.com/calisma2/files/uploads/dijebefutajaf.pdfIn PDF document text
- http://traviet36.com/upload/files/welevepumesadesagudopivaz.pdfIn PDF document text
- https://gelblighting.com/userfiles/files/mowematogo.pdfIn PDF document text
- http://linza-market.ru/upload/files/20012833200.pdfIn PDF document text
- https://inunekocp.jp/mailmagazine/upload/files/lebijavufolirebori.pdfIn PDF document text
- http://abwmechanicsville.com/uploads/files/33806755370.pdfIn PDF document text
- http://mothertheresapublicschool.com/userfiles/file/5709248987.pdfIn PDF document text
- https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613433b35dcd8---rodiwaxebazegide.pdfIn PDF document text
- http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210906_62BC4EA8FD60E9B6.pdfIn PDF document text
- http://toyotacri.com/userfiles/files/dotevamodijererodo.pdfIn PDF document text
- https://mimpiindah168.com/contents/files/46378979906.pdfIn PDF document text
- https://farmaciasacoor.com/site/upload/file/10053311839.pdfIn PDF document text
- https://jeanmarcrobion.fr/userfiles/file/5386935768.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_off0000fb48.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB48	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001135f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1135F	11028 bytes
SHA-256: `00ea3fa2f699c1001455ceff6c6e7a270020e6b0294b582e143e5801ff6a055d`
`font_02_sfnt_off00012cea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CEA	18396 bytes
SHA-256: `2c66910dbe927007ef9a695cff082da51d09b57a123c52ac8fd6ec5f59d811de`

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