PDF malware analysis — malicious · 48e947858bd69dc5

MALICIOUS

PDF

81.9 KB Created: 2021-09-05 06:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 21f9644a7e731e33de666e756f40cfef SHA-1: 24798cf97f1616bed2aed16493454e3a7de518a7 SHA-256: 48e947858bd69dc568f542a4cd6e0dd014264de5c64e848cf27994584804795a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm for SEO manipulation or phishing. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan. The presence of multiple external URIs and link farm heuristics supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://allgeology.ru/ckfinder/userfiles/files/tikinawaputaxugenuda.pdf In PDF document text
- https://annjulieskarpmo.com/userfiles/file/30928020401.pdfIn PDF document text
- http://kapelski.pl/userfiles/file/pisujujivitevugogin.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a0f1c3cf6---gefiwutijaxoxawigot.pdfIn PDF document text
- http://debseven.net/UserFiles/File/41530681313.pdfIn PDF document text
- http://benevolo.it/userfiles/files/48952616180.pdfIn PDF document text
- http://gamax-motor.cz/data/dokumenty/56569545743.pdfIn PDF document text
- http://phuquytravel.com/nguyenvanlinh/files/vijimumomega.pdfIn PDF document text
- http://barcelonasixtytwo.com/userfiles/file/17230204367.pdfIn PDF document text
- https://verandapattaya.com/userfiles/files/5034205087.pdfIn PDF document text
- https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af98c0001a2---xibiduworababanekoso.pdfIn PDF document text
- http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/xeramejiwabogekawa.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1dadb9c7c---4979141863.pdfIn PDF document text
- https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/3t59vvlar4gb3l315j19f2jkuo/46727448657.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcd7547890---83869359420.pdfIn PDF document text
- https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/66d35901fe9229c3ef55f16436aa45c6/potuzi.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/vufitinod.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e8aba1002---28842467212.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160739c15401dd---fezelutuworewosu.pdfIn PDF document text
- http://biomax.shop/filespath/files/20210827195929.pdfIn PDF document text
- https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/vdr2v4r2tdjvgt16ibm87n9r30/54202629710.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/95a10f14b23639db406e0334d2edc38d/mofokibajez.pdfIn PDF document text
- https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/2179535225.pdfIn PDF document text
- https://valerart.com/ckfinder/userfiles/files/95403396010.pdfIn PDF document text
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/4a2fb088bba89caed5f3beeac204e931/tolewa.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=volvo+xc90+2005+manualPDF 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_off0000dc0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC0B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f41d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF41D	17604 bytes
SHA-256: `d61a2c9c1067dbc942cb9af641591baec1f23035489d655e3df46d9f216464d5`
`font_02_sfnt_off000121ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121CE	10584 bytes
SHA-256: `677dc9ca94cfe07e10d5fd95c018421efef3c0984ccc441be6d68e0bf4f517ad`

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