PDF malware analysis — malicious · dfb5178d2fa54c6a

MALICIOUS

PDF

90.3 KB Created: 2021-06-28 09:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: f3c37a13dc05b85d9504e63fbb1cb553 SHA-1: 375e2602bc706f3a5c2465fe247b309785c6c0e0 SHA-256: dfb5178d2fa54c6aab33a07b6a1d52125ac16b21f942861a829e6f575faf9536

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 critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links indicates a redirection or download attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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 http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ckgenq8mip03uoif8gomam7be0/nuroxifukijetetegi.pdf In PDF document text
- https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/5a17db1e52a0eeb4269dffa3dbaad096/778231303.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/b9f7e2f1a17a195ffe793fc6555a86e9/81176849054.pdfIn PDF document text
- https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5641407c63---24187290667.pdfIn PDF document text
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c921202b9---41781007009.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e83ea03a81---97777755876.pdfIn PDF document text
- https://isabellepieman.com/userfiles/file/dobuzimopatesilifogot.pdfIn PDF document text
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082e23f9fd16---34831876496.pdfIn PDF document text
- https://gadd-asso.org/userfiles/file/jexebowogepibifimo.pdfIn PDF document text
- http://mini-garden.ru/userfiles/file/18640229976.pdfIn PDF document text
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077dc49954e0---33771819687.pdfIn PDF document text
- https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/2a74dbb4b32ba8a74f92556a72862f16/40310768255.pdfIn PDF document text
- https://muguet.fr/sites/default/files/file/7928805272.pdfIn PDF document text
- http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/s9ou1ch7hggjuii0pdudm2d1m0/93317757860.pdfIn PDF document text
- http://saovietgroup.com/upload/FCK/file/1221356041.pdfIn PDF document text
- https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/4f7497a85c2923d13fb393b0f976e056/bugaboxowukogakuxowep.pdfIn PDF document text
- http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de1f6ed2e7---suxemaxekuxagimakutatu.pdfIn PDF document text
- https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a42ac7fb42---wamogovofolododikoti.pdfIn PDF document text
- https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/3108c21e1c8e7a465e813de4f4ffee30/pikolubu.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e230d2ab0---66761169084.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c14b75d6de0---kekonekupinuxoragaga.pdfIn PDF document text
- http://www.hmh.sk/files/articles/file/gexegofopifulisimoro.pdfIn PDF document text
- http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/o2gngn9v9ndah5nm3cmcl383c7/70917870954.pdfIn PDF document text
- http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c06727ae1---bifubu.pdfIn PDF document text
- http://accomplishtheimpossible.com/userfiles_ati/file/93550875909.pdfIn PDF document text
- http://batiment-tunisie.com/userfiles/file/zajukinozorafir.pdfIn PDF document text
- https://tavio.ru/files/file/nitogujexofemunolizifu.pdfIn PDF document text
- https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/aef16af5f51be07cf31a4cc9cd1adff0/watijetilinefife.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=best+book+for+physiology+mbbs+1st+yearPDF 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_off0000f9ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9ED	17444 bytes
SHA-256: `ef9dfd9f053ba26cfa4f319ac5e06f76c5a445ac1efee5a44def26ad67041492`
`font_01_sfnt_off00012780.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12780	11152 bytes
SHA-256: `b0fb9e1f603ee6a998886c2fea5323adb027e0d262ef2260403eceee384d0779`
`font_02_sfnt_off00014187.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14187	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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