PDF malware analysis — malicious · e7ad490fa6218c57

MALICIOUS

PDF

83.1 KB Created: 2021-09-04 04:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: e56f6af0e4d07246d48a484593169131 SHA-1: 532d529d65ebd4b9dd21ab00bfb03221d74f52c9 SHA-256: e7ad490fa6218c570a47f8df6d7731c5ef660cfa543ca7f8d628f4d420c91bef

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming, suggesting the document's primary purpose is to redirect users to other sites. The presence of embedded JavaScript, combined with the link farm, suggests a potential for further malicious activity or phishing attempts.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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 https://elegune.net/files/galeria/files/47528362321.pdf In PDF document text
- https://atiksigorta.com/files/58381988263.pdfIn PDF document text
- http://tonyprins.nl/images/uploads/file/4780490781.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1b1245342---zegubitinede.pdfIn PDF document text
- https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/e53b1d34a50c685e80d8589af81447b5/1917560489.pdfIn PDF document text
- https://whiteplacard.com/UserFiles/file/80487295355.pdfIn PDF document text
- https://jaurrieta.net/USERFILES_JAURRIETA/files/dopifigemovepomamirare.pdfIn PDF document text
- https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c6d7975dc---kusogipe.pdfIn PDF document text
- http://fsnmmaterials.com/UPFILE/userfiles/files/53221627698.pdfIn PDF document text
- https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/4edcf99b0b7662dec1472419603dff00/4032825323.pdfIn PDF document text
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073af094a5b2---nesobevuledobevodi.pdfIn PDF document text
- https://clubberia.com/js/ckfinder/userfiles/files/pimiribiwilaz.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7f453e7c9---niditixijugomebodapam.pdfIn PDF document text
- https://vanrun-it.nl/userfiles/files/60917766573.pdfIn PDF document text
- https://digireg.pl/upload/84925552882.pdfIn PDF document text
- https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/547c16da755b969676ea028642587f32/dabubisusoropumimu.pdfIn PDF document text
- http://ucinnovation.ru/admin/ckfinder/userfiles/files/dovaziwerarudebezo.pdfIn PDF document text
- https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/v50ffp8urfd5fqlt9itlapr9sl/sivabisasejugagepo.pdfIn PDF document text
- http://staractivecollection.com/resimler/site/files/77843024905.pdfIn PDF document text
- https://fivetc.net/uploads/files/99355774208.pdfIn PDF document text
- http://richardchong.com/userfiles/files/84775956220.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612905c106495---sikiduniziroxavewo.pdfIn PDF document text
- https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/beab5f70a9360f4463c66218a1500e9f/59486397335.pdfIn PDF document text
- https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800dfe207ae---9693350074.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/5c52bd56244a555e4d1904c9bc306214/jezokimogifutivij.pdfIn PDF document text
- http://geluidsadviesnederland.nl/ckfinder/userfiles/files/viwabirogi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=past+simple+and+continuous+exercises+pdf+intermediatePDF 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_off0000dca2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCA2	10984 bytes
SHA-256: `7304f9ac26a01d2baa58ca44d3745a7e3a56ee91fcd01e8bcaa6342f7695e718`
`font_01_sfnt_off0000f61c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF61C	18604 bytes
SHA-256: `909a8ed577ab01e31e9685c810762961bf645c2dfabb2012063d33bdb35eafd4`
`font_02_sfnt_off000125ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125CA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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