PDF malware analysis — malicious · c0daafc449388080

MALICIOUS

PDF

88.8 KB Created: 2021-08-17 10:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 4aff5a39cf9cb191d01dcf3ca4883edf SHA-1: 25d1908d561a85c909ad8c21715c3841a9cc1e3b SHA-256: c0daafc4493880801e0db7228613502e991ecf607a4a568015222c2ab62e6b93

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or SEO poisoning attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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://irish-setter-zucht.info/ckfinder/userfiles/files/puxowuxexewexuvib.pdf In PDF document text
- https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/dcc52d3c8d231edfaec0f898d5b76f06/6316190281.pdfIn PDF document text
- http://fantalife.nl/userfiles/file/kosazuzexen.pdfIn PDF document text
- https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1a7c4e8e4---rawobifadoleta.pdfIn PDF document text
- http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160bef66918422---83308020673.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/a5cfbc0bc62f30ddc0a0440bbe084740/mibixuxis.pdfIn PDF document text
- http://africareview.in/userfiles/file/rifukaf.pdfIn PDF document text
- https://lotteppta.com/beta/assets/file/2437248908.pdfIn PDF document text
- http://scbczy.cn/up_files/file/20210628_214254.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719f9b46cab---74561214050.pdfIn PDF document text
- http://pulsarvn.com/media/ftp/file/lesapulegavixeb.pdfIn PDF document text
- http://ddservice-bmw.pl/userfiles/file/88729101003.pdfIn PDF document text
- https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16095d1a2f072a---62553650079.pdfIn PDF document text
- https://scavilecis.it/userfiles/file/fusamigom.pdfIn PDF document text
- https://dnmpaint.com/sdcc/images/file/wavefere.pdfIn PDF document text
- http://geopraxis.it/userfiles/files/buzunafafatiwalum.pdfIn PDF document text
- http://andlupa.com/userfiles/file/46821187758.pdfIn PDF document text
- http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/aba8b7ced4aea4af217ed6bf902f7257/46621577866.pdfIn PDF document text
- http://savoie-outils-coupants.com/ckfinder/userfiles/files/60073895295.pdfIn PDF document text
- https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/2grij5a0so31njjv05s70vv6rd/dupibalaxedel.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b140d422ad5---xidufusex.pdfIn PDF document text
- http://makinsushi.com/uploads/files/1268402375.pdfIn PDF document text
- http://dzbnf.com/upload/file///xulewetuviwukini.pdfIn PDF document text
- http://demkapi.com/resimler/files/kalon.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=simbolog%C3%ADa+ansi+para+diagramas+de+flujoPDF link annotation
- 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_off0000f2be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2BE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010ad5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AD5	11252 bytes
SHA-256: `a2f6bafbbd9fba91faa48f3e1329db9dc7ab102446429f10c762cf3212eb4f5e`
`font_02_sfnt_off0001249f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1249F	17864 bytes
SHA-256: `82beaa5f430f111e826a1a2f5d0fd2b0ac927c6a540c2fb9cf2331d78da04f68`

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