PDF malware analysis — malicious · 750f3a7e773c06f1

MALICIOUS

PDF

70.7 KB Created: 2021-09-06 19:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 008b518bb55eeaf6e10f4647692a4bf3 SHA-1: 597cffe2ba07959552892e8e1ced68b52ac1d3d5 SHA-256: 750f3a7e773c06f10c624df023a9792fbf392e5a23423f7790199f755319c55b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the distribution of malicious content or redirection to phishing sites.

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 https://suprizpin.com/calisma2/files/uploads/dowipebekamoda.pdf In PDF document text
- https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/8f8adb6bd67384f7637fce0f8a290249/gilufedikenim.pdfIn PDF document text
- http://cokhiminhhien.com/media/ftp/file/8470924792.pdfIn PDF document text
- http://perilatomsk.ru/ckfinder/userfiles/files/jozoxano.pdfIn PDF document text
- https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/domfp29ddkt3u0qv45qfu6rdvn/51875270701.pdfIn PDF document text
- https://aartipalette.com/userfiles/file/sijujanoporigidin.pdfIn PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dbf678c7f---64489349529.pdfIn PDF document text
- http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f15317adaa---patazisagoloxakuzunemusif.pdfIn PDF document text
- http://dogable.de/userfiles/file/664670605.pdfIn PDF document text
- https://adasms.fr/userfiles/file/56642390941.pdfIn PDF document text
- http://koddous.com/userfiles/file/56981859399.pdfIn PDF document text
- http://kiemtoanhaiphong.vn/upload/files/32589190099.pdfIn PDF document text
- https://bishopsalamatkhokhar.org/userfiles/file/12057240956.pdfIn PDF document text
- https://tckontrola.hr/files/91964915227.pdfIn PDF document text
- http://uteambio.com/upload/files/debevakokupokuvalodaxuze.pdfIn PDF document text
- https://giant-nano.com/app/webroot/userfiles/files/lewiruzuluvotebevefelewiv.pdfIn PDF document text
- http://vejwun.cz/images/gijipoveliginenevidinasuk.pdfIn PDF document text
- https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/9350012806ba2f33d0628df53ac3e513/34751926789.pdfIn PDF document text
- http://tuanlongland.com/upload/files/76810617125.pdfIn PDF document text
- https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/daluxufogizuvebugas.pdfIn PDF document text
- http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a57276d1cac---53959765080.pdfIn PDF document text
- http://begemot-rus.com/uploadfiles/file/2021052118413273499.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161281a5724f90---4899292357.pdfIn PDF document text
- http://aiswaryamatrimonials.com/fck_uploads/file/webufujugajenojebob.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=anatomia+del+tronco+celiaco+pdfPDF 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_off0000b41d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB41D	16004 bytes
SHA-256: `27813542477b9fed7dfdce3e0949afc48cff44be24533f14192614796dce17de`
`font_01_sfnt_off0000dcf7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCF7	10596 bytes
SHA-256: `b1b95098630670a148dba7de66f8e382d6a00ca71d245f3eda7a2b49c987c80c`
`font_02_sfnt_off0000f51d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF51D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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