PDF malware analysis — malicious · 46e273843d64807f

MALICIOUS

PDF

96.3 KB Created: 2021-06-28 05:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: d1757d8129c196fb5a91d68161b90b83 SHA-1: cd66ba9805ff5c84925e54178ff4f4e64ab82692 SHA-256: 46e273843d64807f43c29dea545832936377c8267d11a39568b8fa83e9fb8b79

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The presence of multiple distinct hosts and a high number of links per host reinforces the link farm characteristic.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://pc75.net/upfiles/file/1621910220.pdf In PDF document text
- https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/i1l3tvek8guj7qbr68crdeb8ls/6436467211.pdfIn PDF document text
- http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bba85148f---xipavikepisuzojije.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/0noppgg0gnl30fpku72qmcssg4/mavileladuvox.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb6698305---94238514118.pdfIn PDF document text
- http://skrabl.pl/www/rpbd/fck/file/tijavozavemejanajun.pdfIn PDF document text
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c8f4b1cd2---41111322558.pdfIn PDF document text
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088437c3ad8f---55899546034.pdfIn PDF document text
- http://sl-light.ru/design/img/upload/file/43443272434.pdfIn PDF document text
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbddb9bcba---26081555711.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b87cf504e96---51902104901.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea638d502---pejefewowegujerowiw.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19208dc4e8---nugepakuxamop.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fa5moh5gmp6f825vvf4mq95a0e/79095776553.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160966356edd53---wakodopuwegogipaluna.pdfIn PDF document text
- http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609a888b2a693---46068289030.pdfIn PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607c855ef04c9---todefujesulutojudunufir.pdfIn PDF document text
- https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/03af027f100c82d945a4c44e8b2ef92c/26890969589.pdfIn PDF document text
- http://tablica-nieruchomosci.pl/uploades/fckeditorfile/labonunuziwimikakemovo.pdfIn PDF document text
- http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/rejami.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/923b77497c3982ecd6955b118e6d1427/14211989464.pdfIn PDF document text
- https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/978872166db1f8d2e252dbe8453ec6f2/67336804539.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=nihongo+day+by+dayPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eaef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAEF	13492 bytes
SHA-256: `905cd3f34593eb8b92353ddfe0048443df693e28c3f514274c3afe94b4a21036`
`font_01_sfnt_off00011545.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11545	10216 bytes
SHA-256: `c336d3872baf6f7b57ff6f8587326842ceb0841fa8241974b9332014e707bd3f`
`font_02_sfnt_off00012bd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BD6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off000143e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143E8	18528 bytes
SHA-256: `d2919909a258938a8730bf423a56fef0b9c0ccd5ca30aeba7640cd9f4da82de8`

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