PDF malware analysis — malicious · 5c959be35c42704e

MALICIOUS

PDF

82.9 KB Created: 2021-06-26 03:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: a9ebabe7ee6301d9d6656f0625faff76 SHA-1: 5af883199269ed8ba0be1ea398eab4d0f66ee0f9 SHA-256: 5c959be35c42704e122d625c8583a4b9e871fcf02dbf2f77d316047116e1691c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile strongly suggest a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://capitalsyndic.com/userfiles/file/nijizirevaf.pdf In PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/lvgsl4pj6h1v6invtuqo8hqkii/56983510482.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607708a5da07e---foxubatuweduwerusuga.pdfIn PDF document text
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/992072733b0c116092fee68406c6924e/87514451794.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/13617361443.pdfIn PDF document text
- https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//munebamejurifexinesabik.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a12dbd9937a---27772787004.pdfIn PDF document text
- http://world-green-hope.com/uploads/files/welari.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb7294ddad---mizupam.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8154a557cd---mixezobabebatekarupusez.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/954a2d0303de6e3533e26b94723c9e9b/lasobarage.pdfIn PDF document text
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608922de574d1---susivedonoxopo.pdfIn PDF document text
- https://gagiongvitgiong.com/ckfinder/userfiles/files/95086711383.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/71752fcd9480859c2c6b62239722163f/fiwizavivimibumu.pdfIn PDF document text
- https://mmagame.com/userfiles/file/82831379409.pdfIn PDF document text
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088b7a9c10db---mafivulumejimofanixajasax.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4d1724d75---81700155796.pdfIn PDF document text
- https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/19cshrclgmnm4as99k6f7a98fj/kadibetupogurobitedexez.pdfIn PDF document text
- https://dobre-akce.cz/media/files/file/kidetivigezoxasu.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16081ac40ee30e---gagutun.pdfIn PDF document text
- http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/79689273802.pdfIn PDF document text
- http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ed22876ef---kajenanumina.pdfIn PDF document text
- http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16096708e59697---luwolaxofikepujewuzuzan.pdfIn PDF document text
- https://store-connector.com/_upload_bilder/_filemanager/file/54216579551.pdfIn PDF document text
- http://metabolit-plus.ru/files/file/8845809337.pdfIn PDF document text
- https://baatco.com/ckfinder/userfiles/files/85674596289.pdfIn PDF document text
- http://iehyun.com/editorupload/file/70944935665.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853b8a2083d---kotoximax.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=story+writing+worksheets+for+grade+3+pdfPDF 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_off0000e011.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE011	16780 bytes
SHA-256: `e091cf5c5e1dd58dc9a9e0b89358add0df5ed849c3f45306fa65c25572ceb74f`
`font_01_sfnt_off00010b6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B6C	11272 bytes
SHA-256: `c527d32fd48a55cc0b049adf875dac085a9d6f4227676ad0d8f5febd9c619048`
`font_02_sfnt_off000125ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125BA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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