PDF malware analysis — malicious · 58f091d760330558

MALICIOUS

PDF

89.1 KB Created: 2021-09-07 07:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: b55a40a5d700de5fc7c05755deb63fa7 SHA-1: 25a0cd4e82bb8961a6009ae5157bdba073e0d128 SHA-256: 58f091d7603305584861dc3bade097a70e3be835d84789fe3e3fb0ba047f2ea9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a multi-stage attack. The PDF structure itself does not contain readable content, suggesting its primary purpose is to host these malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/8b39ff41fd742e0a2201a93c2ee72d56/90299480372.pdf In PDF document text
- https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/fe3732abeee8ecbdb50d48ab3038c7d5/nodewaxajorirazipukixot.pdfIn PDF document text
- http://iccj.jp/images/uploads/fckeditor/file/10486665528.pdfIn PDF document text
- https://vaitinhdien.com/app/webroot/upload/files/29860999176.pdfIn PDF document text
- https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/dce601dd8bad840667ea8688db000afc/62897062324.pdfIn PDF document text
- http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718b548b72c---4671868484.pdfIn PDF document text
- http://skncn.com/u/files/xoxadiximivepofune.pdfIn PDF document text
- https://medgal.pl/admin/ckfinder/userfiles/files/tubagavazubututofegiwit.pdfIn PDF document text
- https://zhansq.cn/upload/file/99545179597.pdfIn PDF document text
- https://hiperaktivite.info/userfiles/files/65393534080.pdfIn PDF document text
- https://baohohoanglong.com/userfiles/file/finawe.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107fd64d6304---kaferogoteraju.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9dba1dd97---noxunulinemizari.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/tttha1h0u0qdsln8io7tusoan4/nofejotixijebegowofavet.pdfIn PDF document text
- https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/zomenaweroka.pdfIn PDF document text
- http://uni-farm.pl/ckfinder/userfiles/files/62620515217.pdfIn PDF document text
- http://sportsclinicwest.ie/media/contents/file/7296642015.pdfIn PDF document text
- https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613503e326ff0---zixulifiriwigevul.pdfIn PDF document text
- http://vvk-wiedermann.at/userfiles/file/65505859747.pdfIn PDF document text
- http://whatdwellswithin.com/file/88381795121.pdfIn PDF document text
- http://vecsecity.info/editor_up/mixamurenejinuvemaxuto.pdfIn PDF document text
- http://brette-animation.com/userfiles/file/suluxurowigiguvebo.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894d93a72da---1066729121.pdfIn PDF document text
- https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac83acffb6---vegoxaraxo.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d208999a8d9---tuzekak.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2be99a6d---64341693332.pdfIn PDF document text
- https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/b6f4237cd224e47dc3a3c6754641494f/safasugojosomatakoz.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=statistik+ekonomi+1+pdfPDF 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_off0000efa6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFA6	21360 bytes
SHA-256: `5fc0a048a5f357743364c58184111daa41828771c246d1caf9ef78116c61e2da`
`font_01_sfnt_off00012615.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12615	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013e2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E2C	10732 bytes
SHA-256: `431ce0b9616cca4547d7e70d8b86c620a38b7a7c8f17915816df667bf67bd04c`

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