PDF malware analysis — malicious · b12a597a614e7000

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 06:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: dee56d98fa810aeb51b0dfd02ac595bf SHA-1: c31e49afecf5cc6b47e56a09d1aed124318103f5 SHA-256: b12a597a614e700000ecfc949ea712f830960efae0a3fa812676a8f8b0ba0587

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the URLs and the detection indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://synerhu.ru/uplcv?utm_term=beach+erosion+meaning PDF link annotation
- http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b62f6821769---1587917164.pdfIn PDF document text
- http://m-camper.ru/ckfinder/userfiles/files/sukivopamebanoxubaf.pdfIn PDF document text
- https://www.jnvhardoi.org/ckfinder/userfiles/files/xabafegexukevurisix.pdfIn PDF document text
- https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/39eeea8199f4ebb15509084834c0cd13/50186063130.pdfIn PDF document text
- https://rent-1.es/ckfinder/userfiles/files/85050023195.pdfIn PDF document text
- https://diphong.com/uploads/metubelo.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608faf86d3843---42684673825.pdfIn PDF document text
- https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/aa102e2c662fe04c8bc5f689c4b8a66f/vibakef.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/10bc0220c80f8f30138a58ad19516aa1/77658905300.pdfIn PDF document text
- http://highdesertrent.com/newsite/images/uploads/file/xipokunetixidetipunoxad.pdfIn PDF document text
- http://studiotecnicomancini.eu/userfiles/files/gevegomif.pdfIn PDF document text
- http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/cgd3ktgfeh24n4uq6bsr3rcrh1/5754649830.pdfIn PDF document text
- http://lianbang123.com/uploads/files/202108191910177534.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce9aa5fe9a---bidesuwilobejifi.pdfIn PDF document text
- http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210719144647.pdfIn PDF document text
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/7794855c41f25cf9e2413c4013c03cef/tuxepiwo.pdfIn PDF document text
- http://csc-028.com/userfiles/file/20210719142058_4oue0x.pdfIn PDF document text
- http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d9020d2a3---9586871422.pdfIn PDF document text
- https://marwaautorepair.com/nbloom/fckuploads/file/87067024481.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05c18d93ff---74901953196.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ab61afa268b4fc2579ea46a5b45db790/bububepa.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/55a4661b7a8b48b27e33398d12db16a5/togisapodi.pdfIn PDF document text
- http://hanleyresources.com/images/16571499604.pdfIn PDF document text
- http://humanitool.ru/userfiles/file/texesujepozeduriwob.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_off0000def8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEF8	10588 bytes
SHA-256: `8c7a8a3e2e07a55b2b92ec78a6d6bc98a8e94663e9cee128e27157f885292f36`
`font_01_sfnt_off0000f6f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6F2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010f04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F04	18200 bytes
SHA-256: `61f6f2d1219fec3e1fd8e3f2dc9d8fd59a32fb4e7683e7b7c1f934921bdfb433`

Open this report in the interactive analyzer, or submit your own file for analysis.