PDF malware analysis — malicious · 56280aa936ec58cc

MALICIOUS

PDF

93.4 KB Created: 2021-08-08 12:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: d9c066b54fe5a84ea8911769d5237b6d SHA-1: 0dbf5a501774dad2c3e08c81e0f5ba3375b74a77 SHA-256: 56280aa936ec58cc853e94aba489ae7d358e6dd35b6fec56649a4fb677e754b1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution attempt. The presence of a URL with 'download visual basic 2010 crack' indicates a lure for potentially unwanted or malicious software. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9932

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://pistant.ru/uplcv?utm_term=download+visual+basic+2010+crack PDF link annotation
- http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c96f75140ef---58960705036.pdfIn PDF document text
- https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/ed3ffa2fbcf022e4a6794330d2b1a864/dapuzosuwuvilutusobepa.pdfIn PDF document text
- http://chocoenglish.com/_UploadFile/Images/file/81062169905.pdfIn PDF document text
- https://fertilizerproductionprocess.com/d/files/guxawusumopivobizefipo.pdfIn PDF document text
- https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/9257f1f6f2dbcea34b2b159af9a71330/vuxexaba.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dc4362c0d---kebufepexed.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8a20b91f4---4890403825.pdfIn PDF document text
- https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/c07c758548942c6e2f63aea47d49a3e4/pufinapaxotokisaxozu.pdfIn PDF document text
- http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2703e3428f---lixipuxe.pdfIn PDF document text
- http://topoint.cc/userfiles/fckFile/20210725015546.pdfIn PDF document text
- http://shqinze.net/admin/upimg/file///rowuselosizig.pdfIn PDF document text
- http://phukhoabacninh.com/images/files/kizemixodoluki.pdfIn PDF document text
- http://starinviter.com/ckimagefiles/lizojodaxitiz.pdfIn PDF document text
- http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/706a972c18265b9e16bf075e4b190579/javewejabik.pdfIn PDF document text
- http://camelliafb.com/uploads//files/202108040458346472.pdfIn PDF document text
- http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c942df90cf8---dowep.pdfIn PDF document text
- http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/lavivuxexetetogeta.pdfIn PDF document text
- http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/sikot.pdfIn PDF document text
- http://fullx.net/files/8118856050.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/88d16c95982e1a9e2bb03d9a2d60a584/80065322947.pdfIn PDF document text
- https://patoman.ro/ckfinder/userfiles/files/67117375851.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160da45ecd105d---xibisadubibuvubetuveko.pdfIn PDF document text
- https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/1bc98c2a03a11dac4b7d3afb470755c5/xapagi.pdfIn PDF document text
- https://hoanghaie.com/Images_upload/files/8013573302.pdfIn PDF document text
- http://phrabat.net/UserFiles/File/lufizidorosa.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bd08789b8---tuvoloseponikisudaje.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_off0000f679.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF679	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010e8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E8B	31204 bytes
SHA-256: `08260ecd45171ae560ebfecdb960ab1007022e79ab7fa4bdf4b020c2d1ad8ae4`
`font_02_sfnt_off00014d9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14D9D	10912 bytes
SHA-256: `e9164aaa8a4cda6f2daefc69a39b7e5fe0dc2f145f596ff081b9e0af0777873f`

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