PDF malware analysis — malicious · e512088c5539c5df

MALICIOUS

PDF

85.5 KB Created: 2021-08-23 15:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 1b209bc5d769005223148e62b1388196 SHA-1: 21849a214b214b467e6fc553a16644a029191296 SHA-256: e512088c5539c5df880bb688b1605daddc5952faa10ae5463d27752c74fc652c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, 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 0.9903

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://cructi.ru/uplcv?utm_term=scan+into+word PDF link annotation
- http://ellev.fr/upload/files/jozekoraku.pdfIn PDF document text
- https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f226eb27c---fonigedodorefuv.pdfIn PDF document text
- http://yjccnc.com/upload/files/wegepesareg.pdfIn PDF document text
- http://drshapard.com/clients/73598/File/fisekixu.pdfIn PDF document text
- https://focaccellini.it/file/bogalopemigiz.pdfIn PDF document text
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/27df93cc9566be13f883b5c7d4fd7dde/87263537732.pdfIn PDF document text
- https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb2a6d049---51200750243.pdfIn PDF document text
- https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/46e656fd432b42ec1ba4562fb437055b/37963784252.pdfIn PDF document text
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bea06e1c4b---3301532359.pdfIn PDF document text
- https://tekdalyapi.com/upload/ckfinder/files/45505900245.pdfIn PDF document text
- https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc29210a40---3409590933.pdfIn PDF document text
- http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a79cbc363c5---rusubezupalonavolozokafop.pdfIn PDF document text
- https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/g6ve2aphjkb0st09h619um202o/lukibi.pdfIn PDF document text
- http://on-video.com/movies/movie_data/file/7582392186.pdfIn PDF document text
- http://etasystem.net/userfiles/files/93285326106.pdfIn PDF document text
- https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/8f2bb44ab7b60c317537ec9d248cd085/31650160542.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b2013779b---12521252760.pdfIn PDF document text
- http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608213e2b141e---35949034677.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4a3469754feee3c6431370896372b295/19007908706.pdfIn PDF document text
- http://huthamcauquanggiap.com/upload/files/mozupifajerasavi.pdfIn PDF document text
- http://sghr.ca/upload/ckfinder/files/selubosolobazo.pdfIn PDF document text
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6ac1acbe2---jagivudipogoruvabile.pdfIn PDF document text
- https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//82429871876.pdfIn PDF document text
- http://carszana.com/image/upload/File/75576807446.pdfIn PDF document text
- https://aimara-bg.com/userfiles/file/kumukefolepinimu.pdfIn PDF document text
- http://obasekiestates.com/UserFiles/file/24559603026.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/f1a4hi4g2u77836nrccqe35gof/12809620592.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_off0000ec3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC3C	10180 bytes
SHA-256: `7c7f72ee91f18204217e1576b4d0cf327f58074bb62dbe0f25a8272b499a19cf`
`font_01_sfnt_off00010339.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10339	16960 bytes
SHA-256: `854a86c8ab9273be94ca9c62a867bf2ef6c531906dc3a4196cf17f7485dff1f0`
`font_02_sfnt_off00012f49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F49	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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