PDF malware analysis — malicious · d252e149daa07418

MALICIOUS

PDF

83.8 KB Created: 2021-09-07 05:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 64e5cfb7dd18bba7bd11c372f9e609ac SHA-1: 73cd0d9b90c636dc364665bf3d1f55db57dd9f3e SHA-256: d252e149daa074188fb3bc74885ed8fdf310cf425801354a20db8e44d1599cfa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites, suggesting the document is part of a link farm designed to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/7a3533bb52f25ab9ee810ff8c319d92f/livabe.pdf In PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/bdhmp6f61940ha84etmnmqb4g0/nirivuxigugirax.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/8dh870o4tmfh3lbdeqi2pu3n2q/nametitol.pdfIn PDF document text
- https://jamuiboe.com/webroot/upload_media/44196583225.pdfIn PDF document text
- http://sushiloverca.com/uploads/files/kofalufumaxaxetitufiketu.pdfIn PDF document text
- https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/97d097b714ddb0aa67943dae7007f62c/wimavivuzivikabuwovejis.pdfIn PDF document text
- http://gulfcoolcontracting.com/uploads/userfiles/file/file/16478196066.pdfIn PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b5bd1adc4---xeledaranepisa.pdfIn PDF document text
- http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098424be6f37---19159169339.pdfIn PDF document text
- https://x-leather.com/radsportfiles/file/kimuresiditigagos.pdfIn PDF document text
- http://gps-ambroisie.com/ressource/site-image/files/tewedotovovavifat.pdfIn PDF document text
- https://kaptenhoki.info/contents//files/rututeborosumev.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d73989c04b3ed8dbcf6c8cfff8e4e60e/87467370649.pdfIn PDF document text
- https://osakadentalcare.com/contents//files/jafajamebotefir.pdfIn PDF document text
- https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5fc3182df---65513945178.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160843ce5231f7---salozinasupuwojaz.pdfIn PDF document text
- http://longhornrings.com/clients/0/08/08da48574b41509ac7bedcf2500dc652/File/fupakigabuzuwud.pdfIn PDF document text
- http://harchovyk.com/userfiles/file/82081424324.pdfIn PDF document text
- http://roosprommenschenckelfoundation.nl/userfiles/file/gotitijevufikiw.pdfIn PDF document text
- https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df73e494028---45015737897.pdfIn PDF document text
- https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/34af068d55a2d72c09a7e6a18ba0db6f/jigirakarimojopitubezane.pdfIn PDF document text
- http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26a172fe2d---49599252126.pdfIn PDF document text
- https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/ngp91mmsqh64s6bemn11dp4m5d/niwenidivepovijoron.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/81ead018dee8add35dd018b6eb66e1c9/pedevafumesoruwej.pdfIn PDF document text
- https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/omn4d6dotq7udbb31oug4nsumf/85937846146.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609192438249f---7491339742.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=vcf+to+pdf+androidPDF 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_off0000e60a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE60A	10236 bytes
SHA-256: `42cd1f08bd1c108253af6069e7b13a23aa6717d07073faf45b76e3069a9d576a`
`font_01_sfnt_off0000fd20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD20	17160 bytes
SHA-256: `99019f5cff517f8d55ae0296ef980f7d8862e1eae6d39a35989ee73df8ae458d`
`font_02_sfnt_off00012978.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12978	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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