PDF malware analysis — malicious · 6712b0636bce4deb

MALICIOUS

PDF

89.4 KB Created: 2021-08-17 11:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 95c767e038794980c8adc1d93e6900a4 SHA-1: 5d82dd959ff09f8d76cc8fe432f2399710f62704 SHA-256: 6712b0636bce4deb8a3e8f6bf5461e60d037dbcc754cc00a88213caa28371e59

66 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a link farm pointing to multiple compromised websites, indicating an attempt to distribute malicious content or redirect users to phishing sites. The presence of numerous links on disposable hosting and the use of UTM parameters suggest a coordinated effort for SEO poisoning or traffic redirection. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

Nyx PDF Classifier suspicious score 0.3508

Heuristics 5

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://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/fcf57b86afff8ae5a55181a060e60150/22606440825.pdf In PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608898fdc8719---kowuferafagigupisekemema.pdfIn PDF document text
- http://moscowprice.com/content/xuploadimages/file/dukuxuwatebezefugi.pdfIn PDF document text
- https://ngoctraithaibinhduong.com/uploads/news_file/214767241.pdfIn PDF document text
- https://akapacha.com/userfiles/file/71383523964.pdfIn PDF document text
- http://ks4073.com/file_media/file_image/file/10775541622.pdfIn PDF document text
- https://bamfieldrental.com/userfiles/file/76332928114.pdfIn PDF document text
- http://jaatkinson.com/userimages/66195464600.pdfIn PDF document text
- http://tilestone-pools.com/i/File/60197133492.pdfIn PDF document text
- http://www.ez4parcel.net/upfile/files/2021/08/01/81751933718.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/aef5e7649f94ee9d535ac93979a9f1a6/gixeretevatov.pdfIn PDF document text
- http://sushikyototogo.com/uploads/files/kuvokinutaragezijaveri.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2eb6436187---10313629076.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a120ce514---95519698409.pdfIn PDF document text
- https://maturana.cl/upload/file/denopukana.pdfIn PDF document text
- https://pabrikangka.com/contents//files/velujixekixotokukobet.pdfIn PDF document text
- https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/a0e2433da7237ff3fce819f1c5668ddc/gotivaloruvorukifez.pdfIn PDF document text
- http://medicalproduct.hu/images/files/68399105503.pdfIn PDF document text
- http://computergramm.com/userfiles/file/57771162927.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856fd8db89c---81256871842.pdfIn PDF document text
- http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lunovir.pdfIn PDF document text
- http://auto-spec.ca/fck/file/kebarixaxopapafemuni.pdfIn PDF document text
- https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/f785a15d53eca1cf861e7c07e5fe8240/xedogebagebudag.pdfIn PDF document text
- https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160808fb67c4db---85187204184.pdfIn PDF document text
- http://limuzine.md/userfiles/file/reloli.pdfIn PDF document text
- http://ingegnasrl.com/userfiles/files/70589626277.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=crimson+tide+full+movie+123moviesPDF link annotation
- 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_off0000e909.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE909	16192 bytes
SHA-256: `bfe64e3d917f904c536eed845c8da68738fad92952cf9e53c7c08a5e2fa48a2f`
`font_01_sfnt_off0000fec4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEC4	18208 bytes
SHA-256: `fab0096bc12f2f831f6a276dd653260744b7b1604b56d871504c39e2c81157b1`
`font_02_sfnt_off00012dfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DFA	10892 bytes
SHA-256: `94fdf175216b15c56593b0326dd8d989b7a440b31298f17f239c579741d9d15d`
`font_03_sfnt_off00014755.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14755	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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