PDF malware analysis — malicious · 565f9a70bae21262

MALICIOUS

PDF

71.3 KB Created: 2021-09-01 20:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 61cc615a01804b0c80a8f5bd3966afea SHA-1: a62ddc0f5db7bf186cea649ea527faa97b19cb5b SHA-256: 565f9a70bae21262c55c645e334ec7258212f4b63cddace887d28cf68d66bb50

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of numerous embedded URLs, many hosted on compromised WordPress sites, further supports the phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1603c76e2f---59346824889.pdf In PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e392cf838d3---fedizepilafuvemunugisine.pdfIn PDF document text
- https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/e6b648c11298167cb5bdad0c7916e095/6699801359.pdfIn PDF document text
- https://orderpoet.com/ckfinder/userfiles/files/gijivebutitemop.pdfIn PDF document text
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160707e4482251---8726223960.pdfIn PDF document text
- https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/tot7mc2u50csdsellul08sn5ff/77786898421.pdfIn PDF document text
- http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160947fd439cef---vosinasoxuvekobisa.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160cf69492bb94---vafiwetavab.pdfIn PDF document text
- http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/b9vbgeibp08d8nq1hal0mfn29e/90583085894.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e779700481b---25233312359.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/fidixaraxitegebalixob.pdfIn PDF document text
- http://alnoorcity.com/userfiles/file/50467036678.pdfIn PDF document text
- http://tentimesneedlehill.com/UPFILE/userfiles/files/fejewaruseborusezixafig.pdfIn PDF document text
- http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16103bb83e6305---33925511507.pdfIn PDF document text
- http://bjoriginalpharm.com/upload/files/gamizakise.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/6m76hgkt6mapquh7sij95ht5g4/gagekagovatu.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2cbab1ce8---tolorutemopotatako.pdfIn PDF document text
- http://dok-vo.ru/userfiles/file/pubiwaladofanozap.pdfIn PDF document text
- http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc56babe7a7---vufipazawovurixevemixa.pdfIn PDF document text
- http://gfhs1978reunion.com/clients/56625/File/8635199463.pdfIn PDF document text
- http://lyzebrno.cz/userfiles/file/kobugex.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fee45fd2e5eecb94a5e4955a1c4d86f0/88913587463.pdfIn PDF document text
- https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/78ac152344a9da344f9febcc87e8bcd5/govurusilozutu.pdfIn PDF document text
- http://stellar.ru/ckfinder/userfiles/files/88792968740.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=indigenous+counselling+servicesPDF 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_off0000b84f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB84F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d061.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD061	15628 bytes
SHA-256: `2028f72fcecadbac243aa60a9a93341bf9bc6aa814a888e7183984f98caa0589`
`font_02_sfnt_off0000f807.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF807	10400 bytes
SHA-256: `3e12c1632779cd49dd9aa3f188023b9dff9cbb2a836fa73f413bc69941c31c8f`

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