PDF malware analysis — malicious · eb14beb45436044d

MALICIOUS

PDF

86.8 KB Created: 2021-06-29 08:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: e5b89ff78d66c57f6ed49658a01bd9e9 SHA-1: 851065cf73b50f60df6b6afc61bb160ed7efb276 SHA-256: eb14beb45436044da4fbd3028ec338c391822c63d9efe83cc4d3b5acaf2b7743

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a tactic to distribute malicious content or phish for credentials. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect the user to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=tonsils+are+part+of+what+system PDF link annotation
- http://atut-biuro.com/uploaded/file/wewawagenagenodupuxejapis.pdfIn PDF document text
- http://www.thaiboat.net/image/upload/File/maxazojipatubepivojoxo.pdfIn PDF document text
- http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/77394385657.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d429963ed5---21012748731.pdfIn PDF document text
- https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/bf13c34bf1831b4b285abb5dea826bef/xosuwemulasumo.pdfIn PDF document text
- https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/1a241b2895db94c5361dae2f5f7f6f48/5699365692.pdfIn PDF document text
- http://rapabzenec.cz/obrazky/files/vipukixuko.pdfIn PDF document text
- http://nowyhotelik.pl/userfiles/file/65067483100.pdfIn PDF document text
- http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b763c83d162---dudewewajojutaxut.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cd4655744---74872349809.pdfIn PDF document text
- https://tahubunting1.com/contents//files/gukifetutufipitit.pdfIn PDF document text
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607958b78e346---musibexurevi.pdfIn PDF document text
- http://crmloccitanecr.com/campannas/file/zukisozedo.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/23bac142f25549a0eaf035e33f909adc/jumefapilexaxekuw.pdfIn PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a57e627bdc5---jotazofuzufuxini.pdfIn PDF document text
- http://yeosingol.com/FileData/ckfinder/files/20210609_7FA24B6483EB559A.pdfIn PDF document text
- https://adasms.fr/userfiles/file/zumikeja.pdfIn PDF document text
- http://anandtouristcorporation.com/uploads/xegagotuku.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f8db61024---kewamujovawafekari.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607231ced186a---87997546887.pdfIn PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/haa5liusqb8nc0vb4pukc3u4jn/65541598047.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c47673a18---mepudemefid.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/43721dfafaf556ebc2ea5eadeb93b1df/2524311034.pdfIn PDF document text
- https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/ce76c7e879ec1eca48fad32545462982/67450385170.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_off0000efed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFED	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000107ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107FF	17304 bytes
SHA-256: `8eef94c270fc45533941274d26f57f31ff658386cb5521116c158c06d9f2e28a`
`font_02_sfnt_off0001352e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1352E	10788 bytes
SHA-256: `1bb51ce306a44e72f7a59bc7e7a67bebcc5968447572a523931e072cdadb16c2`

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