PDF malware analysis — malicious · a2ff744576a727b4

MALICIOUS

PDF

88.2 KB Created: 2021-09-06 03:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: bdcdf6faffb119e3f97b36e1850a0f13 SHA-1: f491aac64f56f6de277b85972181ce0f5d85247f SHA-256: a2ff744576a727b472b2b05fed099e56aad5ecb4a104e1b8053f7842f1604328

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to exploit user trust through a deceptive document.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL

PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
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=cardiology+explained+pdf+free+download PDF link annotation
- http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16116eb2a6fcee---12127589141.pdfIn PDF document text
- http://sonnenheizungen.ch/fckeditor/editor/images/file/lifobuvunivazat.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114d4dd67c8d---99549001767.pdfIn PDF document text
- https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/0ee26d2040045e9611e021d2add06a1b/vibabeg.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090291eac168---28945738840.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dacad919c---75090544514.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/30898211929.pdfIn PDF document text
- http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed6bab17bd---91705889643.pdfPDF link annotation
- https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/c88d78e64568d7c5b72018e486311e23/57852542084.pdfIn PDF document text
- https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/2e53b0017269df161a4fa0f9c28f3c50/90204820126.pdfIn PDF document text
- http://fittbikese.hu/files/file/93647063219.pdfIn PDF document text
- https://eghamatkade.com/basefile/eghamatkadecom/files/mewatixeb.pdfIn PDF document text
- https://digireg.nz/upload/zabugofefibajodagubifutek.pdfIn PDF document text
- https://daismene.it/file/felisakepefinaxobew.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acddd78fdbc---96994756506.pdfIn PDF document text
- https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/wolubipesimudaro.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613298e05b2b1---51778417182.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/26f1f1e3e914bbb119ad6a3086b8d397/tixebazi.pdfIn PDF document text
- https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/0m12jl4currcaajq77itl4mctf/59234910023.pdfIn PDF document text
- http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc60c4ba4dd---38262076614.pdfIn PDF document text
- https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/80ff67f9e1f967b4ce903a22ea1af91e/dijexokopigudinut.pdfIn PDF document text
- https://art-eria.pl/mandarynka/pliki/files/66224787264.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8999ae80e---16258298055.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161251bd211730---11544540165.pdfIn PDF document text
- https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/6d24c33c99990b5e94529cbf0b352c6e/24131938715.pdfIn PDF document text
- http://gourmethousemacau.com/UploadFilesfile///jewanifewebaderaso.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/91ae32c31d486327578823636fa6a620/sidomolobok.pdfIn PDF document text
- http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d92e005d58---91035818711.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_off0000f15d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF15D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010974.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10974	10740 bytes
SHA-256: `f0a32562a93682af6ec95bed67289fbb181324bfeb41d7e6e335173f599e0fc9`
`font_02_sfnt_off0001220e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1220E	18520 bytes
SHA-256: `62676f68d89605dfd6b3b83a738e85f5c9c6298dcc1b5630b35c4881d8eef563`

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