PDF malware analysis — malicious · 15e629db4492c73e

MALICIOUS

PDF

82.2 KB Created: 2021-08-17 13:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: f5f5008ed41b7fe5a35c1a0810dbc752 SHA-1: f971477f3b31acf2d86ec4e0e0b0868c7e0ed8ca SHA-256: 15e629db4492c73eb90a620d0d310bc84f8ca5d6c561145dc77f7888c550bd7b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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=simpson+character+creator+app PDF link annotation
- https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/4190d372a2859806268f6983983c8a63/75799584597.pdfIn PDF document text
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/b41c34f9fe98415b42425db9ef134f46/xasojenewarekununerubiw.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a485f40f33b---14316328491.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/xateko.pdfIn PDF document text
- http://dabaizhongxue.com/upload_fck/file/2021-5-24/20210524152655151097.pdfIn PDF document text
- https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/97a0008d3f10d1eb637fb46489da2c9e/bomavuvirumatewarewab.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/8f7u05egkuc99pfcl5mr9a7qij/86317245249.pdfIn PDF document text
- http://sanchariglobal.com/userfiles/file/rotatubimavudaxa.pdfIn PDF document text
- http://studiopetrilli.it/userfiles/files/delabumowarogup.pdfIn PDF document text
- http://aihyang.com/userfiles/file/fewufolozeniz.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/3a53ce7049b7f2b8dde9088d47d0dd0f/ginoposuguva.pdfIn PDF document text
- https://wemservice.com/ckfinder/userfiles/files/63368884466.pdfIn PDF document text
- http://nhs1968.com/clients/65482/File/vewubewirejaxotukapijema.pdfIn PDF document text
- https://lysgaards.com/ckfinder/userfiles/files/ronokepumawetalat.pdfIn PDF document text
- https://amoslodge10.org/ckfinder/userfiles/files/24517373435.pdfIn PDF document text
- http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/majofofo.pdfIn PDF document text
- http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c15320496e---lavijitobam.pdfIn PDF document text
- https://fokusmedia.com/images/uploads/kajogisuxexikegatebilafub.pdfIn PDF document text
- http://chipublichouse.com/ckfinder/userfiles/files/sefurevu.pdfIn PDF document text
- https://indiansabroad.uk/userfiles/file/lojufopajoputevenamune.pdfIn PDF document text
- http://fotofolliasanlazzaro.it/userfiles/files/kezaxetefezujemoxinizolu.pdfIn PDF document text
- http://kadh.kr/bobod/upload/file/32939743495.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8261502080---gatuvem.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/0c90d061d592a007ee06ba20a6a1bf19/4414037625.pdfIn PDF document text
- http://alexanderkanevskyartistbiography.com/clientMedia/file/19832778551.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_off0000e13a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE13A	10668 bytes
SHA-256: `8df7b130213a4c87b602e01bbdde78ffd5bf70107fea82bc01c603c96f294cab`
`font_01_sfnt_off0000f974.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF974	16188 bytes
SHA-256: `02b31ddae1d289ffdfc6419beaad3b1e4a2854202f8e42793aa7f73365902c87`
`font_02_sfnt_off00012307.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12307	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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