PDF malware analysis — malicious · bd9b6fd071fcac0b

MALICIOUS

PDF

86.4 KB Created: 2021-07-05 22:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 63c934ea8c69032742a889fe87e90b30 SHA-1: d4254c2527eba60f6226031eb4995065c08c53b8 SHA-256: bd9b6fd071fcac0b670c0bd2776343823ad76c6d40a0da9a1ccc9c54913ddd95

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories and disposable hosting domains, suggesting a link farm designed to redirect users to malicious content. The file's structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/bpd0e4cmfq7p9iabq8mbji0oj0/94657960290.pdf In PDF document text
- http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f75f877a6c---jidisajax.pdfIn PDF document text
- https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/285af3639e90a5c30df93eff3dd15f8d/37111119806.pdfIn PDF document text
- http://vytvarnyobchod.cz/UserFiles/File/77582778005.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5468ef0f6---jivasazarujeve.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/16f5c23e63e54f2f05c267f8f9d4d900/40909417673.pdfIn PDF document text
- http://peusch.lu/userfiles/files/lojefefelosuzopodavu.pdfIn PDF document text
- https://eventspicer.com/ckfinder/userfiles/files/vajufikufelefivob.pdfIn PDF document text
- http://nuraski.pl/wsg/userfiles/vavudopexibazuzamurim.pdfIn PDF document text
- http://npi-management.org/ressource/site-image/files/81721005547.pdfIn PDF document text
- http://xn--or3bi2da319p.com/upload/fckeditor/file/57243653493.pdfIn PDF document text
- https://sharadsangam.org/UserFilesTwo/file/63335720344.pdfIn PDF document text
- http://studiotravenzolo.it/userfiles/files/jovovukupivuwibarozawew.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c758d0fb6---65993178085.pdfIn PDF document text
- https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/hhecghvmfh31vphvad4fhev06f/83675702073.pdfIn PDF document text
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/153de3bf5b6763fe174a064586d1c8ae/dajizogafaje.pdfIn PDF document text
- http://al-bandak.com/userfiles/file/45259447728.pdfIn PDF document text
- http://ottotech.center/userfiles/file/47334257252.pdfIn PDF document text
- http://fitnessklub-impuls.pl/uploads/assets/file/xigigituretufiguzefofokos.pdfIn PDF document text
- https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087dda870745---42522250365.pdfIn PDF document text
- https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/fato2tjlsj005nmmu606nam552/xagenekokulubetop.pdfIn PDF document text
- https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/8c121c4dfb8899d4ffbf9a58d3c82f4a/wuxodopakexukib.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2b2291143---75894039381.pdfIn PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5a371e262---88742276722.pdfIn PDF document text
- http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85930d7eb0---54929992107.pdfIn PDF document text
- http://circuitoinsulargc.com/documentos/file/nigemutapozuxonebok.pdfIn PDF document text
- http://euro-ex.com/lorebufuwilop.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=golden+beets+nutritionPDF 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_off0000efd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFD5	10360 bytes
SHA-256: `df7bea8042459ac916bff515feaee30ec040b83c69a0240ed7594e49b48e7867`
`font_01_sfnt_off00010751.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10751	17208 bytes
SHA-256: `09fc785b0af7ae39a1db58b4355058651856d8347f8b317fb5f43ed0903fa318`
`font_02_sfnt_off00013458.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13458	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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