PDF malware analysis — malicious · d7af3fe3b6777e93

MALICIOUS

PDF

86.3 KB Created: 2021-06-29 15:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 7d0ccd2cbe37089b61a740d6ce713dab SHA-1: ec08bb869684bd054da60eddfcd48ce5fc9b150b SHA-256: d7af3fe3b6777e93233c9e06cb6bcee675898577641b024a085fcf693e77761d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://pistant.ru/uplcv?utm_term=slur+and+blot+meaning PDF link annotation
- http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04813207fe---koxinuberezilaluwewogas.pdfIn PDF document text
- http://aristosaigonhotel.vn/uploads/files/goxasumobaxuwa.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ae3d57487---vusememekapodiwaxubo.pdfIn PDF document text
- https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/db9c241bf5239d6de75eaf37dc11fd0d/7029601029.pdfIn PDF document text
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/b2b24c05f3957dfd7000c56e612309b5/14061984398.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/0rgcg06bhj17qsn0cqthv0vpl9/gopajexiwilanuz.pdfIn PDF document text
- http://myucmas.com/userfiles/file/vukuxiwajekarogavogurulop.pdfIn PDF document text
- https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b0aa98613---87500731247.pdfIn PDF document text
- http://pngroup.pl/ckfinder/userfiles/files/8714596026.pdfIn PDF document text
- http://royalrep.com/userfiles/files/zutefofewulomofeza.pdfIn PDF document text
- http://prestopc.it/upload/file/57832500562.pdfIn PDF document text
- http://gancza.pl/userfiles/file/xalanolewufasu.pdfIn PDF document text
- https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddaa7d232f---migamadukeb.pdfIn PDF document text
- http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4551ab6d2e---7321909545.pdfIn PDF document text
- https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/b03645ad43a642a8b1c29274ac4b649f/6693434688.pdfIn PDF document text
- https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/4f60546132d61363cf11452e78cf799d/82930383746.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4ee68fcad463d8b4f90d8c7f49a740af/8013690255.pdfIn PDF document text
- https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/069684bbb1535b441df6f6517a69e9bd/19955548183.pdfIn PDF document text
- http://bycongroup.com/UserFiles/file/24641373828.pdfIn PDF document text
- http://begemot-rus.com/uploadfiles/file/2021062115042273499.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c3ee5703e---75034651838.pdfIn PDF document text
- https://boumqueur-edition.com/upload/fckeditor/file/96343433039.pdfIn PDF document text
- https://zoldlepes.hu/userfiles/file/73105897242.pdfIn PDF document text
- http://tubietelbar.hu/uploadfile/40149374697.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_off0000e33f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE33F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fb51.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB51	24512 bytes
SHA-256: `17bd10553a3682daec3fd07049cb993a19e6913140b9483fb81c0e44ae87c325`
`font_02_sfnt_off000133be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133BE	10740 bytes
SHA-256: `06968ed24eb2dc671aa163e1d46a0330ec406483bd9db28a2332c3db8bc73570`

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