PDF malware analysis — malicious · b76a2f95ada27e67

MALICIOUS

PDF

89.0 KB Created: 2021-07-30 20:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: b6e05540281df8f7c731425e9a3d5aa2 SHA-1: 4d67155a4dc1769593f7989f08d2023305dddda9 SHA-256: b76a2f95ada27e6700d8f7703350116a5be9878e5b8c5edf2262a1471b5045db

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within a PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9986

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://festival.bg/fckeditorfiles/file/xezofenojimonorawasutameb.pdf In PDF document text
- http://mwflower.com/upimagesfile///zolalomev.pdfIn PDF document text
- https://noble-program.site/js/ckfinder/userfiles/files/zugawotapogaxozumozireku.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f371b62020---65315750706.pdfIn PDF document text
- https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b27e2d64e57---84128691931.pdfIn PDF document text
- http://ailizia.com/userfiles/1524376994.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/46e84029c77168ea69114d4a6e578e27/8334924638.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce081504acd---befovebokatamu.pdfIn PDF document text
- http://nfrostov.ru/upload/files/67982970353.pdfIn PDF document text
- https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/pevb2sgt9ctrqmo75ur9h536dr/fedibotuvinanetumuzefut.pdfIn PDF document text
- http://zrdb-drogbud.pl/Upload/file/sewefumotavodobobisilu.pdfIn PDF document text
- https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/915cb0c9db63bc6e3d29a9d4908750a2/88303530418.pdfIn PDF document text
- http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/livukipovipedewavinuruw.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/1seh78949slm2hioiguutg8m0e/1598526090.pdfIn PDF document text
- http://aitrans.org/UploadFile/file/F1202105210442584405.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/04pocf3tsinrl1lkruskpmhss5/zaxug.pdfIn PDF document text
- http://embeddedhr.com/ckfinder/userfiles/files/88078159594.pdfIn PDF document text
- https://mimpishio2bet.net/contents//files/jukowawejodujaboxeb.pdfIn PDF document text
- http://yao-cheng.com/uploadfiles/20210620032545.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bce706889f4---dijasosetanewisadalox.pdfIn PDF document text
- http://lucann.com/Upload/file/95153197061.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/0b96l2mf2vq0bjc538uhokdbp1/4070717811.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607236c7148ec---67437961891.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/mnmmilhgf6n8amgsqb6u0l3sj0/15938990850.pdfIn PDF document text
- http://fittbikese.hu/files/file/69884503240.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=are+emily+osment+and+miley+cyrus+friendsPDF 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_off0000f743.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF743	10832 bytes
SHA-256: `19b91fdf996d6f560e8c9100a9d9da6844246250a7fc3f28b2df345eb78bf474`
`font_01_sfnt_off00011047.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11047	17084 bytes
SHA-256: `a8eb6c4df66db8e399723dd11d472577b9a5ece1c438d68c6b831bd8049d422a`
`font_02_sfnt_off00013d02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D02	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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