PDF malware analysis — malicious · 7b33b27c798cfbff

MALICIOUS

PDF

84.1 KB Created: 2021-09-01 00:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: eeb117427bfe27b2aa0354fbdb228c03 SHA-1: 63ad98ffd43501af875d0c6c52450cba9ee091d5 SHA-256: 7b33b27c798cfbff415a0cf7ef0ef6099ad608d49026b3442b9100177051c2cb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded links indicate it is likely part of a spearphishing attachment attack, aiming to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9944

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://nomylo.ru/uplcv?utm_term=men+search+for+meaning+pdf PDF link annotation
- https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/e69fd583c732588f0da4ff154ba8fd1b/7511555024.pdfIn PDF document text
- https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/4051654c6ba5d3931dcc64ab4831683f/64471967120.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/2e8660f19be19466a19edcd54c813591/4663271169.pdfIn PDF document text
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/161298ae486e9b---sepaxekawerafipiba.pdfIn PDF document text
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16103015b9f266---38010163751.pdfIn PDF document text
- https://menu2uplus.com/images/file/figoxe.pdfIn PDF document text
- http://topas.lt/userfiles/file/walixipapijigefomi.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/161102df611b68---69738597713.pdfIn PDF document text
- http://zap-interactive.com/uploads/files/liwidow.pdfIn PDF document text
- http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b09502f0c3d---70908747379.pdfIn PDF document text
- http://anaminfo.com/attachfile/file/wilowudufovuzab.pdfIn PDF document text
- http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737f37407e6---nozowijoramasejumowisoped.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beebf99c982---75278346137.pdfIn PDF document text
- http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/kuvuxevaraso.pdfIn PDF document text
- http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b9b905572---3158355303.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/67f2i99mrtba6ric0b4ssningt/puwejegemurunosoxunuselu.pdfIn PDF document text
- https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083e3d3481ab---kuwefizumada.pdfIn PDF document text
- https://efficientinfocomm.com/ckfinder/userfiles/files/gupuzonagozerada.pdfIn PDF document text
- https://vivaldiroberto.com/img/files/mediafiles/file/58865654146.pdfIn PDF document text
- http://www.herbertvanderbrugghen.nl/draft/3856605311.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16071d9a130025---domopesimajuzekofatoz.pdfIn PDF document text
- https://bbu.vn/Images_upload/files/tetabusozelomojavawone.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16080b7753c366---xuxejugapazixiji.pdfIn PDF document text
- http://qianxi.cn/filespath/files/20210818104805.pdfIn PDF document text
- https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/39d0f8ea05666f31e641b89e4c098cb4/fomonorizoravafijemori.pdfIn PDF document text
- http://boschvietnam.vn/files/usersfiles/files/72145593069.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_off0000e2b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2B9	18076 bytes
SHA-256: `5d123ffe736b33f605845ce59d428585401f4bcd4a1ec18837b36a47b3797095`
`font_01_sfnt_off0001116e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1116E	10916 bytes
SHA-256: `e89fa950d84f8fc1e3f812233f6cb1e1411c228ce96ef18ad40d4fb00e80c9b2`
`font_02_sfnt_off00012a4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A4D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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