PDF malware analysis — malicious · 6a46078fd7ca5347

MALICIOUS

PDF

89.6 KB Created: 2021-09-02 15:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1e1cafaeab4e63f7b27918fd8ab7df82 SHA-1: b8e95f0dc9856cb24105a88bd6f1ec9f081fa82b SHA-256: 6a46078fd7ca53475fd0eb264d53d6bd0b2239b83babfa7c681a147d4a700981

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9913

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://wastran.ru/uplcv?utm_term=grade+6+math+worksheets+dividing+decimals PDF link annotation
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb58707474a---32804085684.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/11483339650.pdfIn PDF document text
- http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef75ca4d37---daxadudowuna.pdfIn PDF document text
- http://anhuifan.com/upload_fck/file/2021-5-29/20210529032023567142.pdfIn PDF document text
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa7ade3684---5648717010.pdfIn PDF document text
- https://jdrum-music.com/uploads/ckfiles/files/resolivepanivosenodeba.pdfIn PDF document text
- https://sharmtocairo.com/userfiles/files/21509946258.pdfIn PDF document text
- http://elhammagazine.com/ckfinder/userfiles/files/33997556796.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/1a0eca128187456298823c95fde245d6/64772843115.pdfIn PDF document text
- https://harkakotony.hu/UserFiles/file/13084627362.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611bc450c3dda---47208201627.pdfIn PDF document text
- http://interwork.sk/userfiles/file/59054825806.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fbaf54ff6ff4ec027d35b02758713371/fojoxedadesapumemig.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092274f949e2---vexewapesezizedorebowaro.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70ea64c2a9---fegomodo.pdfIn PDF document text
- http://nesthomes.in/userfiles/file/39282677795.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118de7da9d77---piludimuxudutisaposavuwol.pdfIn PDF document text
- http://www.leposeur.fr/site/upload/ckfinder/files/betikutev.pdfIn PDF document text
- http://dlmberatung.ch/userfiles/files/luvelefemepuxamebub.pdfIn PDF document text
- http://gcoekmr.org/cukashmir/User_Files/imagefile/28173806702.pdfIn PDF document text
- http://gazosilikatnn.ru/uploads/files/joxosaxodidumobugore.pdfIn PDF document text
- https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e078f4e91c45bc33bdef02a174d3dca6/tomisegugajamizoja.pdfIn PDF document text
- http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2afa83275d---totupodovufevovin.pdfIn PDF document text
- http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081dd6c0efc6---89606682368.pdfIn PDF document text
- https://hzautomatisering.nl/userfiles/file/83067109524.pdfIn PDF document text
- http://fsanaq.com/upload/file/210827150519793251zk62ojjigud6.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_off0000f596.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF596	18532 bytes
SHA-256: `29182d4cbcdc4257e4e248dd21e212646fd720067b5c0f55e69266e70010cf6c`
`font_01_sfnt_off000125f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125F8	11268 bytes
SHA-256: `2706aa4b0bcf16490b9fe75d91c0f2887222938ce03a6637004b0c871a2c489f`
`font_02_sfnt_off0001402b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1402B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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