PDF malware analysis — malicious · cc9a353a4635baf8

MALICIOUS

PDF

89.1 KB Created: 2021-08-22 02:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: b376fcde53c0f66eaf43db82e7ae6558 SHA-1: 01f81bfe91555063f830f2944298ff93e5bb4eaf SHA-256: cc9a353a4635baf8664d2d5026672e9b0d1ceeeb698564bea1ce0ab4f2959255

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple domains, including compromised WordPress uploads and disposable hosting sites. The embedded URLs suggest a phishing or malware distribution scheme, aiming to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9738

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://usis-consulting.us/uploads/files/gagob.pdf In PDF document text
- https://pass-eco-energies.com/ckfinder/userfiles/files/fabikomatijin.pdfIn PDF document text
- http://galettedesrois.hu/userfiles/file/kixafiligifape.pdfIn PDF document text
- http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/q3of44e2462nse3ogb2tnegr2g/kajabaxok.pdfIn PDF document text
- https://jnvhardoi.org/ckfinder/userfiles/files/nizitixekiremifeluzigum.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/de663424267c58d043e6a0dd1233e14d/53739033961.pdfIn PDF document text
- http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982aa6a1c0a---22936387041.pdfIn PDF document text
- http://fpole.ru/sadm_files/basujikozipuwan.pdfIn PDF document text
- https://beauty-full.ru/uploads/files/4537423978.pdfIn PDF document text
- https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2473b23c80---rorivalokoxixebu.pdfIn PDF document text
- http://profil-metall.de/content/uploads/file/53734307076.pdfIn PDF document text
- http://harposwebdesign.nl/app/webroot/files/userfiles/files/xikosasagalurix.pdfIn PDF document text
- http://arcomproltd.com/userfiles/file/linezatokawujajonetuxage.pdfIn PDF document text
- https://heks-tech.com/app/webroot/userfiles/files/kakaxedajekilutedujedade.pdfIn PDF document text
- https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/63024c173ff424655f2c25f4ebc63d7a/rosokexubomexe.pdfIn PDF document text
- https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094aec95835c---zoranod.pdfIn PDF document text
- https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/cda1a8ece3f1eea870738058b575d905/86727063009.pdfIn PDF document text
- https://peintures-descours.fr/fichier/files/teminalonefovojitoxur.pdfIn PDF document text
- https://computerzone.pk/file/28793803977.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607224ff1137b---kidokorov.pdfIn PDF document text
- http://samurairamenbar.com/uploads/files/4987743103.pdfIn PDF document text
- http://hrdiborice.cz/erucom1/files/files/70424009807.pdfIn PDF document text
- https://zlato-eu.cz/upload/files/50420340040.pdfIn PDF document text
- https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/3a7ae823d724b6b082834f55da5c2de9/48978741064.pdfIn PDF document text
- http://xn--e42bt3l.net/upfile/files/lulorixapi.pdfIn PDF document text
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6d9c0a369---juzisojisokeluwusureni.pdfIn PDF document text
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/a3b09234911a4c29be540a95fb47399e/nosinelidobamozafexo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=dragon+ball+z+games+for+psp+goldPDF 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_off0000e998.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE998	3056 bytes
SHA-256: `abf828d98ae994d970835958bec7678b1283c105922726b18e0f668a4e99b811`
`font_01_sfnt_off0000f638.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF638	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010e4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E4F	10852 bytes
SHA-256: `1af7c47a5cc0a9783af98311cb17bd7fe048d95b774a7c88ef478225654c37b4`
`font_03_sfnt_off000126ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126EF	17556 bytes
SHA-256: `a26ee7a66a25cf9a8e9410c0d028549078999907a9200bb03520e679b1ab0f35`

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