PDF malware analysis — malicious · e1cc47f8f9e14c0a

MALICIOUS

PDF

88.0 KB Created: 2021-06-27 08:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 54368dd3daabfdc66c9521689c9f6a35 SHA-1: 68852802f89d0a9050c4959f6eadc97d59d00428 SHA-256: e1cc47f8f9e14c0aa193b304b81c8774875279bd3885749c51a704b2b3cff8d7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The numerous embedded URLs point to compromised WordPress sites and link farms, suggesting an attempt to redirect users to malicious content. The file's structure and numerous external links are consistent with a phishing lure or a downloader for further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://akapacha.com/userfiles/file/9504684313.pdf In PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/sf06223uvjo8t4hto2hc8st1h0/93375327461.pdfIn PDF document text
- http://cesnek-vysocina.cz/UserFiles/File/dilijivok.pdfIn PDF document text
- http://cesurmakina.com/userfiles/file/1586354487.pdfIn PDF document text
- https://muguet.fr/sites/default/files/file/fatovuba.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c08732e3a---dopoma.pdfIn PDF document text
- https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/f186ejsbaqri9bmb6l12gga9nl/15638525622.pdfIn PDF document text
- https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc4055f890---89159051095.pdfIn PDF document text
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/742542183a47e291bf544bff45d247a2/bipukumo.pdfIn PDF document text
- https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/99lbj1c8c9f6h11grprq676r9n/17815778411.pdfIn PDF document text
- https://watfordfairtrade.org/app/webroot/img/files/disazupupipadibedifim.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1010eb72b---tikotavezadukiduvagawowal.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/800f8c1578af532082cd491673ecb82d/wepeleruzakomivovo.pdfIn PDF document text
- http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/wejapuzule.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f7e492fc6---zojogolizufaliv.pdfIn PDF document text
- https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba2d59335b---ramoburabavuf.pdfIn PDF document text
- http://apluskleaning.com/admin/images/file/togudifegafigobe.pdfIn PDF document text
- http://myredm.ru/uploads/file/wunojafat.pdfIn PDF document text
- https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/238f6602e1be9052f8f43df0e8ea40e5/xutosapepiveraful.pdfIn PDF document text
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a4c87c338---76695428347.pdfIn PDF document text
- https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/afde7c7dce72ba67ca1f719254a9f22a/rivujilidasoba.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fbac53a75---bonaviki.pdfIn PDF document text
- http://harchovyk.com/userfiles/file/44082361017.pdfIn PDF document text
- https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/m0kvencfb3r87uei260mmh00sn/71639669243.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff8a1c734b---7769355400.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=food+for+heart+palpitationsPDF 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_off0000f745.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF745	10572 bytes
SHA-256: `a08359595049c738e71383385c264e16fa8bb5e797ee16c61add7008cd50aef4`
`font_01_sfnt_off00010f3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F3E	16272 bytes
SHA-256: `61ffc8ec1f9194820f2cbe7a676e5b05b13cf4906a980bfd4b8290cc863cfb09`
`font_02_sfnt_off0001394f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1394F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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