PDF malware analysis — malicious · 1224d1e082cb2b5c

MALICIOUS

PDF

84.0 KB Created: 2021-09-02 02:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 9d5ee78ba5e7a5139690d65dc4d66cac SHA-1: bdc6d7c8872880c2032e47151da1ae1bb3c4e7dc SHA-256: 1224d1e082cb2b5c2b35268f46d2f206b0c5d84c1a525071bb78a081f9b5ef78

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that lead to external sites, including those hosted on compromised WordPress installations. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://pixomot.ru/uplcv?utm_term=acrobat+reader+dc+download+for+pc+free PDF link annotation
- https://xn--p3t29jo1ed4o4xw.tw/upload/files/vazowunamiva.pdfIn PDF document text
- http://handientu.vn/userfiles/file/betiba.pdfIn PDF document text
- http://bpabv.nl/uploadfiles/file/deridapawipejaletef.pdfIn PDF document text
- http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/kapazebipikipuganujeb.pdfIn PDF document text
- http://studiotecnicodavico.eu/userfiles/files/janezaditebaredasat.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c1504510---rubanufinowokezexezo.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e23d7c99c5---51915132396.pdfIn PDF document text
- http://conomiya.com/images/uploadedimages/file/nemofitis.pdfIn PDF document text
- https://akilanews.com/ckfinder/userfiles/files/bezobuvijikuf.pdfIn PDF document text
- http://www.amedna.com/userfiles/files/41207410351.pdfIn PDF document text
- http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00e812318c---jojimulupono.pdfIn PDF document text
- http://sxcec.org/userfiles/file/31734028223.pdfIn PDF document text
- https://anfauglir.com/images/file/19504595283.pdfIn PDF document text
- https://anmimar.com/royal/userfiles/file/17544265341.pdfIn PDF document text
- http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094343d656e3---12412031597.pdfIn PDF document text
- https://ceral.pl/ceral/pliki/file/bifulolakanajasawetinul.pdfIn PDF document text
- https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160854109479f3---88270780762.pdfIn PDF document text
- http://klubbelgickychobrov.sk/editor_uploads/files/79892166610.pdfIn PDF document text
- http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b89aaf93159---sokirejapidude.pdfIn PDF document text
- http://adams-gold.ru/archive/image/file/28949869064.pdfIn PDF document text
- http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c7c254482---60584906447.pdfIn PDF document text
- http://ekorob.pl/userfiles/file/44782769582.pdfIn PDF document text
- https://gagiongvitgiong.com/ckfinder/userfiles/files/besajorixed.pdfIn PDF document text
- https://cafesca.info/ckfinder/userfiles/files/10644977112.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_off0000e55e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE55E	10560 bytes
SHA-256: `af9e17095f8a8c10d2a278d2cb2aaed8200540d45f7104af9ecc65d341b8278a`
`font_01_sfnt_off0000fd6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD6B	17272 bytes
SHA-256: `965c5be313c8fa978e6063f7a33c6ec8cd47872b10adbe31ce8f20d62b7b3cc2`
`font_02_sfnt_off000129c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129C3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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