PDF malware analysis — malicious · 515077712124bc31

MALICIOUS

PDF

69.3 KB Created: 2021-07-19 01:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: e74702d8637ed48a3549d9a972fa39a6 SHA-1: b66d15ad4d9aa6ef671a576338ec777ab7efcc08 SHA-256: 515077712124bc31d1946193a98df0d556f44d20491b5e58fbc19ec7d01f0dd3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm hosted on compromised CMS uploads. Multiple URLs point to PDF files hosted on various domains, suggesting a distribution or phishing campaign. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely to lure users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887db38e95e---vuligobufededoseb.pdf In PDF document text
- http://maxtarget.by/ckfinder/userfiles/files/piloribugugevesomasek.pdfIn PDF document text
- https://guineaservicesproviders.com/gsp/files/69587476182.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f40e029b7---46120416480.pdfIn PDF document text
- https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/9948eef7b1712a962c0f11cf859ffa45/pizibowipipurenagori.pdfIn PDF document text
- http://tvkinter.com/file_media/file_image/file/53418363426.pdfIn PDF document text
- http://sns-russia.ru/userfiles/file/larolimomurejedawonikit.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16080b9982e65e---30344907077.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/45fa39ad6759886c2e0bd10c1ff47edc/7736465845.pdfIn PDF document text
- http://oasis-inwaste.asia/files/file/85095049788.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/147ce7bb15aa8253c3a6a009696a0915/46712329450.pdfIn PDF document text
- http://mrsjamesirvine.com/clients/82887/File/dusemaxitigudevojakuj.pdfIn PDF document text
- https://musikkursus.dk/userfiles/file/dofazimasosesixok.pdfIn PDF document text
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070e34e29509---lirodutos.pdfIn PDF document text
- https://doctornhospital.com/banglanews24/editorsfiles/files/muxomuwasulip.pdfIn PDF document text
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/1ei6db419p8drsa9pgv1brvvl5/zamigewubedawesenope.pdfIn PDF document text
- http://naturallabs.fr/userfiles/file/safuvamesebaxuf.pdfIn PDF document text
- http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f096b2b7c5---30242394081.pdfIn PDF document text
- https://uangraja.com/contents//files/43970424997.pdfIn PDF document text
- http://ck-tct.ru/userfiles/file/51727796004.pdfIn PDF document text
- https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/13213362165.pdfIn PDF document text
- http://berallebags.com/UploadFiles/FCKeditor/20210625172752.pdfIn PDF document text
- https://amd-export.com/site/upload/file/5333217235.pdfIn PDF document text
- http://agierresrl.it/userfiles/files/41163228698.pdfIn PDF document text
- http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e6046a9c056---mowobaralig.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89305ada0b---gixileneli.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=g+to+mgPDF 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_off0000b542.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB542	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cd58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD58	9684 bytes
SHA-256: `13039d6a78ea70aa96c08f40a93ae692a09a9e98daa92e86cfc714b127c799cc`
`font_02_sfnt_off0000e272.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE272	14916 bytes
SHA-256: `b36ef17cdb8b440360e636318b46b67b27399e109e74405ca81854b083963822`

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