PDF malware analysis — malicious · 83525540ca1b86b7

MALICIOUS

PDF

92.5 KB Created: 2021-06-29 23:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: e877bb8ce86d48e96bef68757279882b SHA-1: 80df6dbcf47f7f992f7813005a7c96f551f2f41d SHA-256: 83525540ca1b86b76698a84a897d91cb8a4b0e07df0515c9adc2eb896c869a33

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised CMS upload directories or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

Nyx PDF Classifier malicious score 0.9764

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 http://nedirajtebosnu.net/userfiles/file/zusulidapotufasusezi.pdf In PDF document text
- http://axiomestates.com/userfiles/file/malidasijajamejamevu.pdfIn PDF document text
- http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1efe0f3a7---pagetidi.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160896d497a3c0---wodegejiwik.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160706bba0ddf7---44335312041.pdfIn PDF document text
- http://hoteldazegliotorino.com/userfiles/files/lupanixileli.pdfIn PDF document text
- http://vako.vn/app/webroot/uploads/files/pafusamum.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea4a7a7131---todevotisegukovasime.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba4a68e55b---58489768347.pdfIn PDF document text
- https://lensprovn.com/ckfinder/userfiles/files/nunefodoju.pdfIn PDF document text
- https://bkht.vn/userfiles/file/8817754463.pdfIn PDF document text
- https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e94d01daf6---xuxazatamulejiliz.pdfIn PDF document text
- https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/e14065def220f2e39c666151965c7b3b/lawekawu.pdfIn PDF document text
- http://airelimpio.mx/img/editor/file/24653701088.pdfIn PDF document text
- https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607077a72d25c---rujitasuf.pdfIn PDF document text
- https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/e3f6ud7ked42jfefi7h71dl7b9/guwexubisomajosuxesalobop.pdfIn PDF document text
- https://advance-pack.com/editor_upload/file/rutusuxixevudebajotazogew.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/ks72dccdmhpv47cst5ak9jn14u/wevinekojagebomixamikane.pdfIn PDF document text
- http://changju-hotel.com/CKEdit/upload/files/vowaka.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8fb42fbb0---23633820109.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/395fae9e8c59108cd39541ea739b6bcf/9649019931.pdfIn PDF document text
- http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089dac81d66c---8421351798.pdfIn PDF document text
- https://pmeds.us/userfiles/file/92233326659.pdfIn PDF document text
- https://nacionalequipamentos.com/ckeditor/uploads/files/liwizatu.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607147f4e975c---98702940536.pdfIn PDF document text
- https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/291f5c51beaefe8e3e505b666e87c037/36455850724.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=definition+for+inappropriatePDF 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
`stream_003_off0000f822.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xF822	19760 bytes
SHA-256: `d3aab22e94af23e9076449c21dcede79e382192ceee33d9f42ef7b7d42947d4f`
`font_00_sfnt_off0000e163.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE163	10140 bytes
SHA-256: `53d7e3d975a6da623f3aac32ce6af82f970d7383892cae376e05dd2a86183e30`
`font_02_sfnt_off000119a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119A6	18244 bytes
SHA-256: `97489acf584856ff5d9c7280f8359dfc8066b09262ffd08f1d227297cf867d4c`
`font_03_sfnt_off00014a3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A3C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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