PDF malware analysis — malicious · 801595b0ae289068

MALICIOUS

PDF

78.8 KB Created: 2021-07-09 16:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: d4e4bcae1fff33323ed6fb13bb695700 SHA-1: 7ed83507443206ef4ff24bff4cc5ea8f07500890 SHA-256: 801595b0ae289068fee026099adebd28da29899aa868efa6bc917737450d4516

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also includes numerous links to compromised WordPress upload directories, suggesting an attempt to host and distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607183b5ddc72---bibizijamitigotajatilotu.pdf In PDF document text
- http://espacioschillout.es/images/admin/file/fejikisilop.pdfIn PDF document text
- http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ed3bab6f6---wefivodasu.pdfIn PDF document text
- http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc82f505203---kudezijilisozo.pdfIn PDF document text
- http://oprandi.it/userfiles/files/6489168220.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8831e65bf---87485806695.pdfIn PDF document text
- http://poslovniimenik.net/firme_data/files/tabajibirutakos.pdfIn PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080998cdcb99---roxugiwevodef.pdfIn PDF document text
- http://blow-w124.com/js/upload/files/60861842492.pdfIn PDF document text
- http://al-bandak.com/userfiles/file/7054215946.pdfIn PDF document text
- http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c02b13140---35278768505.pdfIn PDF document text
- http://tele-video.ru/upload/files/5844716580.pdfIn PDF document text
- https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6605bbf1cc---52814561175.pdfIn PDF document text
- https://cuisinescartier.ca/upload/editor/file/gapubenotobugiferip.pdfIn PDF document text
- https://zegabilisim.com/calisma2/files/uploads/26966427822.pdfIn PDF document text
- http://fredericjean.net/oplusco/file/73063886309.pdfIn PDF document text
- https://businessservicesuk.com/userfiles/file/vulutidenavenozozevuteju.pdfIn PDF document text
- http://magendans.com/imagefiles/file/31816461781.pdfIn PDF document text
- https://acavacecio.it/userfiles/files/24058079978.pdfIn PDF document text
- http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083041407843---65578120696.pdfIn PDF document text
- http://myrbacken.se/login/ckfinder/userfiles/files/fatibikaluxokodiwigakowo.pdfIn PDF document text
- http://adveotec.com/img/file/jofuzodusalu.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609659dae71b9---toseva.pdfIn PDF document text
- https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/939196eac079d21321164ead93daf2d1/xerazoduruwipovagabezuv.pdfIn PDF document text
- https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/abf6198620748cfd169ddcedc0f9c1d3/lifatodujam.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/400741fee3a996c7f2ac75c8a4ae1295/vatujigita.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=bts+list+of+variety+showsPDF 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_off0000cf60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF60	10528 bytes
SHA-256: `816165b14d6de965579a546bb65ebee562ddeb1c7ef0c1c17fd02a9cb0691159`
`font_01_sfnt_off0000e79e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE79E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ffb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFB0	17420 bytes
SHA-256: `dc45c4154878fcf4ab7f12ed5f130d378a7984a6996c9e5d7b4c0d845dc0f4b9`

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