PDF malware analysis — malicious · 356d162180514cee

MALICIOUS

PDF

86.8 KB Created: 2021-09-17 23:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 9c786364071caa6f31309cf097a2efbc SHA-1: 4f4d00feb57679c3882ee1c329cc2b68178384fb SHA-256: 356d162180514cee542b0dbfb4ee1833bf18d16981b9b2e15f8405c6495e8647

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external malicious content, likely for phishing or malware delivery, consistent with a spearphishing attachment attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://synerhu.ru/uplcv?utm_term=la+crime+stories+4+mod+apk PDF link annotation
- http://origo.ws/userfiles/file/supurijilugepalesazumib.pdfIn PDF document text
- http://creatinglifeoptions.com/userfiles/files/jomibosuwavabizajajod.pdfIn PDF document text
- http://samurairamenbar.com/uploads/files/sufopuwifelotapikagal.pdfIn PDF document text
- https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161357411d0aa8---85086556585.pdfIn PDF document text
- http://everest-c.ru/ckfinder/userfiles/files/savawiji.pdfIn PDF document text
- http://uro-medical.pl/zdjecia/fotki/file/pobukozarujerov.pdfIn PDF document text
- http://sporteambiente.it/ckfinder/userfiles/files/41774293720.pdfIn PDF document text
- http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfd5818f89---77398321499.pdfIn PDF document text
- http://0575zl.com/userfiles/file/74637637531.pdfIn PDF document text
- http://argol-editions.fr/userfiles/file/gigorujimuboweder.pdfIn PDF document text
- http://technimexvn.com/images/ckeditor/files/3226076806.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/a27941995d56834f73316cce1ab6ef8b/2681397358.pdfIn PDF document text
- http://dinskayarealty.ru/media/file/49561878059.pdfIn PDF document text
- http://dynamicyunnan.com/ckfinder/userfiles/files/12597116464.pdfIn PDF document text
- http://allseasonsart.com/uploads/fck_uploads/file/vojibawunuzo.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161368bf733dd9---belexoxisiride.pdfIn PDF document text
- https://noithathoaphat11.com/upload/files/18267852933.pdfIn PDF document text
- https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16136f53466ad1---gezatixezobexima.pdfIn PDF document text
- https://altonika.pro/files/fck/file/puvugukorogogenebabona.pdfIn PDF document text
- https://oceanflowerhotel.com/uploads/image/files/72918195072.pdfIn PDF document text
- http://beiks.info/public/file/nadosikififovasewi.pdfIn PDF document text
- http://goldenstarhotel.vn/images/uploads/files/gozazakanugofitopudawotos.pdfIn PDF document text
- http://odnoklassniki-files.ru/images/uploads/files/62421016619.pdfIn PDF document text
- https://fiberglasssupplydepot.com/userfiles/files/6308381936.pdfIn PDF document text
- http://designklasse.de/ckfinder/userfiles/files/72162666025.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_off0000ec2a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC2A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001043c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1043C	18564 bytes
SHA-256: `0edc076b46616b06f6d2c06c9f80d47787af43732b47d2c3bfa4d1a5a2103616`
`font_02_sfnt_off00013573.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13573	10652 bytes
SHA-256: `b9c1ee166092c063ea2ead2d122a52f9dac789c44f3e274d3b6b69a437a95425`

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