PDF malware analysis — malicious · fa4ca5fde5083295

MALICIOUS

PDF

86.7 KB Created: 2021-06-28 12:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: eb96e394472705a0c0d6830d648af9ce SHA-1: d8a7ff021a16999b2bb82eb6f5cffb6f7f2af610 SHA-256: fa4ca5fde50832958fcb6669e9626567586cdf5932b0d2716ba1dd27460fc66a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure itself is also indicative of exploitation, with duplicate object bodies noted.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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://smidgel.ru/uplcv?utm_term=how+to+save+scan+file+in+pdf+format PDF link annotation
- https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/7f1494a27589b55708b107fec878f6ef/bapegikobabumimugaz.pdfIn PDF document text
- http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aea6154c708---sepidotipekuz.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/4ge6hr0cn9qh1fgkmjvhv2kie2/62809409402.pdfIn PDF document text
- http://cathugo.de/res/wysiwyg/file/sizatubufajaj.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/5f8790247a7ef0638ca24e44ab77299a/66598090249.pdfIn PDF document text
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/2c87aa162ae636575ada9e270481e2ce/74260543468.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a81fb49fba5---motulexarenipuv.pdfIn PDF document text
- http://geoodwierty.pl/files/file/sekel.pdfIn PDF document text
- http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/0d8013677bb4af7e940981facc1029e7/lenidexi.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986d0f324f0---jedibavatederodoba.pdfIn PDF document text
- https://hkbca.org/UploadFiles/file/20210618155428139.pdfIn PDF document text
- http://nuraski.pl/wsg/userfiles/1675982631.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/vej0qlr0pvv3goohihslg4tqg3/movetinabatam.pdfIn PDF document text
- https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/4c3f7cc04d1570fc5c6cf2741cfaf391/85962284804.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b7f969a07caa3060802712a75f6b6332/milidokezep.pdfIn PDF document text
- http://beloezoloto.ru/userfiles/file/66573698926.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc42f430e2---mafakuxegopupebafilu.pdfIn PDF document text
- https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/a8c69691a0380b20c9926d7b57f34d2f/savimajaxapokefip.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e4a4bf27a---90582737207.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/84d2ac2b99cb91e3b6ef1c71d9cdeb54/zopimonajowesufijar.pdfIn PDF document text
- http://ampletrekking.com/userfiles/file/wupomoxobosepoxezob.pdfIn PDF document text
- http://granitemountainranch.net/userimages/45274946214.pdfIn PDF document text
- https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/a74dfb2e0a39eeb9d78e209477c2762d/7633294267.pdfIn PDF document text
- http://twfbs.com/ckfinder/userfiles/files/nukezoxizasedon.pdfIn PDF document text
- https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/96b1e9006e7d24bd6980b8c3abce1787/nipujofavakakofuxikaliz.pdfIn PDF document text
- http://babywagen24.de/userfiles/file/774440252.pdfIn PDF document text
- 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_off0000edf2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDF2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010609.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10609	10924 bytes
SHA-256: `221214032f19e829fa74b2aed143b2c9e0e1973d1d0dca7857d878b32f5a718a`
`font_02_sfnt_off00011f53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F53	17208 bytes
SHA-256: `67d3a6e7de85a21e9d8ce395adee2a0d760118f312baf92a78dbce7539449873`

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