PDF malware analysis — malicious · 3a46964ee3a7593e

MALICIOUS

PDF

82.3 KB Created: 2021-08-20 05:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17

MD5: 94a03664d98003a52aaea3e95553d7cb SHA-1: 5d73caa5f8a8c08551bc4de3bea536a94493c2ca SHA-256: 3a46964ee3a7593e15ba1573f0608cf1abe275e9ceda32af02e4587070a0cf3a

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, with high confidence. It contains embedded JavaScript, a common technique for executing malicious code within PDFs. The PDF also exhibits characteristics of a link farm, with numerous external URIs pointing to various domains, suggesting an attempt to distribute further malicious content or phish for information.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://drironcat.com/images/file/kutamomixira.pdf In PDF document text
- https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/85aa18d744bc848612e95ff9701a6f60/1768988936.pdfIn PDF document text
- https://keram-market.ru/files/uploads/files/jikod.pdfIn PDF document text
- http://tt-ural.su/admin/ckfinder/userfiles/files/6472520437.pdfIn PDF document text
- http://utopbrake.com/uploadfile/files/bamofetijewiv.pdfIn PDF document text
- https://cornerstonelaw.eu/userfiles//file/kegike.pdfIn PDF document text
- http://waetsukai.jp/system/ckfinder/userfiles/files/2426381593.pdfIn PDF document text
- https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/5637a6d1be688ccfbe4f81d5093bf131/ropudiwosegegiwojuv.pdfIn PDF document text
- http://doo-san.com/userfiles/file/20210515164458.pdfIn PDF document text
- https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/bc7f73b9fbb57fadb59b610bbaaf7329/fopunifexifebobe.pdfIn PDF document text
- https://dafelia.com/files/sexin.pdfIn PDF document text
- http://buydecor.ru/uploads/files/96947174186.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aedfbb75e23---59453994905.pdfIn PDF document text
- http://koovappadyscb.com/ckfinder/userfiles/files/kusikikoluka.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e049ee19e94---36129209530.pdfIn PDF document text
- https://konferencii.ru/js/ckfinder/userfiles/files/71070318553.pdfIn PDF document text
- https://aihr-iadh.org/uploads/FCK_files/file/97524066906.pdfIn PDF document text
- http://pphu-joanna.pl/fckpliki/file/90453365884.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/95e19ca61a5a34de406ed10ac2db88e4/ponawixiwifegoninuv.pdfIn PDF document text
- http://businessnavigator.in/ckeditor/uploads/files/fuwanesutefum.pdfIn PDF document text
- http://benthanhsgfarm.com/images/uploads/files/bifedovewudosomemu.pdfIn PDF document text
- http://ilsogno-bomboniere.com/userfiles/files/gikelijilamubigazev.pdfIn PDF document text
- https://svltv.in/userfiles/files/dakokavanuvuwokogizamax.pdfIn PDF document text
- http://apluskleaning.com/admin/images/file/73713992844.pdfIn PDF document text
- http://ontsgoi.shop/uploads/files/dokotemixelavavufu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=komik+ask+s%C3%B6zler+indirPDF 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_off0000da82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA82	10668 bytes
SHA-256: `af2b65172cb338c0aaea9f530a0e8b3c1f08f249d0e09244f68e0a34f5a2788e`
`font_01_sfnt_off0000f28e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF28E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010aa0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AA0	19080 bytes
SHA-256: `8d85f8aa2d3c1cd841587557756b7ac271de8ff36690818017f35cc5ebea7b85`

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