PDF malware analysis — malicious · 94c470a3b45a0ffe

MALICIOUS

PDF

85.1 KB Created: 2021-07-20 20:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: b8b5fadd64847c213881bf3b00d40466 SHA-1: cd59226a4e03a1e1bed51ab754f1de2b681ad554 SHA-256: 94c470a3b45a0ffebcc9b05b47e608e277896998b0a4fd627a4ea79963e10cfd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload directories, indicating a likely phishing or malware distribution scheme. The file's structure and URL patterns suggest it is part of a link farm designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c741157cb4---97961930076.pdf In PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/c1fc0baab11d60e6dcb8607c417c2d52/gotoxugukifapaku.pdfIn PDF document text
- https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae01eaad08---jofizu.pdfIn PDF document text
- https://syntellect.ru/Repository/file/84674070497.pdfIn PDF document text
- https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed832008d7---sudog.pdfIn PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac620044e43---54139556560.pdfIn PDF document text
- https://cafemocion.com/userfiles/file/boforizezafatofatavoli.pdfIn PDF document text
- http://joyear.com/ckfinder/userfiles/files/19273605655.pdfIn PDF document text
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e657c3a00e---77223771341.pdfIn PDF document text
- https://sportyou.fr/ckfinder/userfiles/files/komemofaj.pdfIn PDF document text
- https://telechips.com/ckfinder/userfiles/files/mituzoxenor.pdfIn PDF document text
- http://oilandgaswork.com/userfiles/file/95782198647.pdfIn PDF document text
- http://seritour.com/rsm/files/fanugi.pdfIn PDF document text
- http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608620a211903---7408725259.pdfIn PDF document text
- http://mjsolankifoundation.com/fck/imagesfile/40449991032.pdfIn PDF document text
- https://aneri12.eu/res/file/robijapulox.pdfIn PDF document text
- https://balbok.net/admin/ckfinder/userfiles/files/posozalopofabuvizuleta.pdfIn PDF document text
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc202b83f1---lulamud.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1eff31e5d1---76184995970.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081911e5be43---bimawijeve.pdfIn PDF document text
- http://vds-construct.pl/userfiles/file/zolagofajavaxo.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/uva393kerib30d1q0trbcrr1l5/lovizevu.pdfIn PDF document text
- https://pjkconstruction.ca/images/file/zalorejataxokerukipatoge.pdfIn PDF document text
- https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/c4ae43b0f8a3fa015874d601d8c5dcde/visulata.pdfIn PDF document text
- http://theartofdesign.nl/ckfinder/userfiles/files/27170864318.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=give+an+example+of+an+open+questionPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eb35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB35	10872 bytes
SHA-256: `7d215edd2c682584828a0724f2f1de1a19493d0bf11c35944593521084a352ae`
`font_01_sfnt_off00010460.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10460	16400 bytes
SHA-256: `f3b478426546b1d6be49dbdc77e1898151996863310932fc48f3568dbd69c10d`
`font_02_sfnt_off00012edc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EDC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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