PDF malware analysis — malicious · fa646bf60dff3cca

MALICIOUS

PDF

75.4 KB Created: 2021-08-21 20:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 5924cd972b404a63446bc8c055e76265 SHA-1: d2931e7bd21262cefe9b526ebc8d7c9c22c58f95 SHA-256: fa646bf60dff3cca02ef1c989a49765b1e58bd705037cd916b5b77c8fa7cdcf4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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=graphing+rational+functions+worksheet+2+answer+key PDF link annotation
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/6l99dp1tdr9j9df699hqc9n9k7/24355326381.pdfIn PDF document text
- http://www.dawnrotaryclub.tw/UserFiles/files/27030939149.pdfIn PDF document text
- http://jsdarvin.com/files/77899238294.pdfIn PDF document text
- http://serbanindustrialconstruct.ro/uploads/files/36193596717.pdfIn PDF document text
- http://aylincinarli.com/fckfiles/file/53312535051.pdfIn PDF document text
- https://pet-fashion.ro/mm/file/bebafa.pdfIn PDF document text
- http://ingfrimale.com/userfiles/files/66807892818.pdfIn PDF document text
- https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/0ce429f1e7c8de73a2d9a9a26a153e2a/44566427752.pdfIn PDF document text
- http://chronocertif.com/userfiles/file/valevazirumimokaxop.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/72749ba391618f01a3a9aa2b073dab6f/1908315035.pdfIn PDF document text
- http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f06b113bc---rosepusuvekapozivukadurow.pdfIn PDF document text
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/8qs3k9fpefm8vfkp6la7d5oa03/towekub.pdfIn PDF document text
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/0d03a1076a6c52796a15b8bd82973a3a/misozisinatuzumuro.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d83fd93fe---piwoxuranigopinutenowitib.pdfIn PDF document text
- https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/a48c27fcc05f168f4d6e87db8a889d97/26716368101.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_off0000c528.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC528	11312 bytes
SHA-256: `7755b6819797375c04cb4270398c0db88df8a35012b5a6f0ab4324349f8d72c4`
`font_01_sfnt_off0000dfe3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFE3	15884 bytes
SHA-256: `48601d9fca3e8f560db4f73083d8df6badb57f99bde7219df83a092623056b21`
`font_02_sfnt_off0001084b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1084B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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