PDF malware analysis — malicious · e06a57668974cff1

MALICIOUS

PDF

84.8 KB Created: 2021-07-05 19:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 2d44d4ef2830ef2ca41fd22103d5dc1f SHA-1: d25a0b8e973202de0c41a22a949f341ee165c12d SHA-256: e06a57668974cff1351dc287b18c875a9cb99720398d0a5057334dfdcb336a17

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded URLs and the detection names imply a phishing or malware distribution scheme.

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://laborke.ru/uplcv?utm_term=his+promises+are+yes+and+amen PDF link annotation
- http://samnakthodrahassob.com/userfiles/file/ridavuniserefirivez.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092c64bf048e---53536342451.pdfIn PDF document text
- https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/58ce22ec3e79d0c03f17e5ed783ec0f9/2968802246.pdfIn PDF document text
- https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55f6aac45f---relijixitixebasojalasubo.pdfIn PDF document text
- http://anatolianlgs.com/userfiles/file/10017806411.pdfIn PDF document text
- http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728eb9c472c---74664035132.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce29ee2773---maninilas.pdfIn PDF document text
- http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/fupiraro.pdfIn PDF document text
- http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/valedulujod.pdfIn PDF document text
- https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/10bjhu0k1ktnmgbkf22k9ko61l/90328741385.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e278ea841---3194421505.pdfIn PDF document text
- http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/97622242039.pdfIn PDF document text
- https://twr1115.net/files/fckeditor/file/tofizevusufajumovupukoru.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841a75c7a54---joxipuzezeg.pdfIn PDF document text
- http://cjmjwarrickhudsonfamilyreunion.com/clients/9/9b/9be434dcd9982d5451de1b36a82eb828/File/ponusebodegawalix.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f2f6d2062b44f509c8fc8131a5aa62a1/nofejavulitoruxuw.pdfIn PDF document text
- https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/d27143ffa32533c1130f3419c7ce874a/55559752957.pdfIn PDF document text
- https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/d89lfphtkcnphs4oktfqt173ul/82253863192.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99f92a21fe---59547374498.pdfIn PDF document text
- https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/1fc57dcb74694f00c6a6093cd94500a6/74573094286.pdfIn PDF document text
- https://avenue102.com/uploads/file/10771360926.pdfIn PDF document text
- http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/nsaq8q8ohesvcdncerpen34tt0/zenoge.pdfIn PDF document text
- https://kodcomputers.ro/2664/uploads/zoviw.pdfIn PDF document text
- http://allseasonsart.com/uploads/fck_uploads/file/38385362194.pdfIn PDF document text
- http://autoshiftbid.com/fckeditor/userfiles/file/37899038552.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_off0000e926.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE926	16660 bytes
SHA-256: `bc70386956da36adb5a3146f8b7c456f766a2448de7b92aca438e1af6c26e1f1`
`font_01_sfnt_off00011452.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11452	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012c69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C69	10516 bytes
SHA-256: `6caeba9973d6bc39a48e7f4d2a9dc36d70162a5c36eaae4553b53ad684a2e1cc`

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