PDF malware analysis — malicious · 599921e3ede9175f

MALICIOUS

PDF

96.0 KB Created: 2021-08-07 23:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: c0256476fdffd5578cdb0d0d39ccc47a SHA-1: adaaa2c4b06c0bb6a5feaf44a4d0c7fd87ec0824 SHA-256: 599921e3ede9175f98d90387817bed400cb33b1980d4c0c1bc7b328ec40ca884

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs, many pointing to compromised websites or disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9926

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 http://pogservice.ru/userfiles/file/zovesadezujikeso.pdf In PDF document text
- http://hrzservices.com/uploadfiles/file/74208518703.pdfIn PDF document text
- http://cephedanismani.com/images/pages/file/wovad.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608844d3ed984---taniluwidirikisi.pdfIn PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160adbb92263dc---jasolosifowefom.pdfIn PDF document text
- http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/i86j5gkkiu0kbf63u6dqbbr0s7/24257249129.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/907762c2057eec219bba276d1e08b3bb/4934644572.pdfIn PDF document text
- http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/10449800088.pdfIn PDF document text
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160745ae1176d4---xosasigilibepokatokejelen.pdfIn PDF document text
- https://gilbertems.com/videos/file/52995387642.pdfIn PDF document text
- https://topclassgreenery.nl/images/file/mimimijenode.pdfIn PDF document text
- http://mishelik.ru/userfiles/file/1442453231.pdfIn PDF document text
- https://madeirashopping.com/userfiles/file/67637584240.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b39734b3ac---birimenonewitosodofew.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f7c05c807---tagizugulesipid.pdfIn PDF document text
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877dc4a1d58---semibixumopolujatejala.pdfIn PDF document text
- https://falconshipping-uae.com/userfiles/files/20654419857.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb333867ad---mavajeboledesoxo.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/dikrd7jlkbhc7n7pc27m0eenmi/6605894706.pdfIn PDF document text
- http://architects-desk.com/uploadsfile/74980846513.pdfIn PDF document text
- http://bscsaoner.in/ckfinder/userfiles/files/pabopamekekawarumi.pdfIn PDF document text
- https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/nc45hahdk2hggfd07fcci7rnbv/kevukelabetorawobex.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607684e868f8c---75138272599.pdfIn PDF document text
- http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707208e1c85---96626697251.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=kodak+esp+3250+ink+asdaPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f9fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9FA	10772 bytes
SHA-256: `9fff7946fd2604a8d5d0c099dd6b578d11bce8a5a6a068564680060d435febbb`
`font_01_sfnt_off000112ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112EA	16104 bytes
SHA-256: `1971ed25a86b5176627e0197606bb74791ce9f0a781ef16d0309c437f97d8636`
`font_02_sfnt_off00012835.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12835	18448 bytes
SHA-256: `f37e860c88ab69e2d6fd39852be4875086db3e543d80f80021f4f4eb9a8620b7`
`font_03_sfnt_off00015881.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15881	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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