PDF malware analysis — malicious · fbaadaca10f8657f

MALICIOUS

PDF

88.0 KB Created: 2021-06-29 21:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: c309ba0bd24fd9942800475061d589f7 SHA-1: c7ac3a9f02fdba60a1b9d9de4c9582d2c9195a85 SHA-256: fbaadaca10f8657fee8c29ca5aca59a0cd30ed7e589c845f92b81207d937332b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The presence of external URI links and the overall structure point towards a phishing or content-distribution attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://ketchas.ru/uplcv?utm_term=30+seconds+to+mars+jared+leto PDF link annotation
- https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fae16f4c0e8729d259398104535d1986/42800235473.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607099b33e81f---kekuxuvilunaladedipena.pdfIn PDF document text
- http://allycatering.com/userfiles/pekefeladelakixadonoto.pdfIn PDF document text
- https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/io4hnh0nltu088rkmllnef89ae/99484964476.pdfIn PDF document text
- https://keralahappyjourney.com/ckfinder/userfiles/files/rupofojodizedopanujuf.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0a8fc5c5f---fugibepibadaroxawizo.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e8800ca5e---xevezegake.pdfIn PDF document text
- https://isabellepieman.com/userfiles/file/nolibifo.pdfIn PDF document text
- https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/40528a448a57911e9c86cf76d02ac9b2/12162024507.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fded36bf2---risisavupuzerapetatuger.pdfIn PDF document text
- https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9bf910210f36ddc79561a52dfca5375e/taxaf.pdfIn PDF document text
- http://ukrainski-rosyjski.pl/userfiles/file/20116960179.pdfIn PDF document text
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/bpaq2qqthuamld2jgu1b05bie7/votidesiparokobupam.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b92c157ad6b2d49ad4aa3c7dc3798797/fovajujuz.pdfIn PDF document text
- https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/5vi3scog3l327do0fjf2h1cm8f/78618800616.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729f824905e---23649199663.pdfIn PDF document text
- http://modnyi-buket.ru/uploads/files/71065886839.pdfIn PDF document text
- https://brs.jo/userfiles/files/76811575963.pdfIn PDF document text
- http://dansensvenner.dk/imagesfile///11897097302.pdfIn PDF document text
- https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4ac129812---subudijak.pdfIn PDF document text
- http://www.hydro-tg.pro/upload/file/77244267979.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088a2c1e21c4---46826069285.pdfIn PDF document text
- https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/9aeb101177f4ee3620e5eb86a6763b10/tarunane.pdfIn PDF document text
- https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/461e70632562bac1d37957af96013852/gelikivisisimeluxujilig.pdfIn PDF document text
- 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_off0000f0ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0EA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010901.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10901	10768 bytes
SHA-256: `ff063999d160a5bf54c4df687403881571a71cf37ba510d38ca5108d13e11128`
`font_02_sfnt_off000121cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121CB	18040 bytes
SHA-256: `6e0e1c324f7c9f32e4a3b0d638ed49c7d043b701d64681c4c3db9fd1c1e0e672`

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