PDF malware analysis — malicious · 0395059d501d6597

MALICIOUS

PDF

89.1 KB Created: 2021-07-13 08:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 468b6684c89144735cb37a140c5ab655 SHA-1: df358aa7fc2712ba1cdba00a3f87dccd36766ec6 SHA-256: 0395059d501d6597c456a1c0722fec9f7f6af4a2b31a4db159bedd09df0cebe5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host these 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://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f6429c64b---74879272240.pdf In PDF document text
- https://easypayindia.in/userfiles/file/24138165415.pdfIn PDF document text
- http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609010bf6d450---35878510423.pdfIn PDF document text
- https://soechi.com/userfiles/file/mefedumimizenovagibube.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afbe61d8b28---23550840630.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160984e362198c---nanavakanuzarevo.pdfIn PDF document text
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/b3a7otbmdns6nsf1e7e5fultq9/28078765129.pdfIn PDF document text
- http://beerskiboot.com/img/upload/file/rolumimaregufipuzulamuxe.pdfIn PDF document text
- http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bad72249b---fikes.pdfIn PDF document text
- http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/08c075d89d0da898422a3674d4bc694b/gilamisiralaged.pdfIn PDF document text
- http://farmina.ru/uploads/files/30191916721.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087a9ce0c521---kagawovesabuko.pdfIn PDF document text
- http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097030eee3c7---27433169301.pdfIn PDF document text
- https://rowadalbyt.com/userfiles/files/99379271985.pdfIn PDF document text
- http://softwarefactory.nl/images/file/35294865234.pdfIn PDF document text
- https://samowar.ch/upload/file/nadidukozuxiberotixo.pdfIn PDF document text
- https://batikatravels.com/userfiles/file/657107096.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863c8e47ea5---30536662164.pdfIn PDF document text
- http://tcsm62.org/uploads/news/file/kabuvarirerefevefal.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609269ea1a394---jajisalibun.pdfIn PDF document text
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f97bdeffa2---83928562136.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8bba8746---sazapejajapor.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608554c763679---nosulosaguledojeror.pdfIn PDF document text
- https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/71621ef1e3a8e3fda88e3c31328d10be/65329751567.pdfIn PDF document text
- http://chnli.tw/CKEdit/upload/files/zixopowivawojiwikutasibu.pdfIn PDF document text
- https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e97a951f7b---fibidopaxe.pdfIn PDF document text
- http://zabradli-znerezu.cz/userfiles/file/99706185826.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=marco+polo+discoveriesPDF 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_off0000fbf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBF1	10364 bytes
SHA-256: `dc1a427d692a1c4975cfe018f3f4940bf836e3fadb1bef94a87953b7fa50d7b4`
`font_01_sfnt_off00011379.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11379	16936 bytes
SHA-256: `6f57150a91d3235375eebf54d0fa71f757d6112777aaa4efd82fc33beb80b8eb`
`font_02_sfnt_off00013efa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13EFA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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