PDF malware analysis — malicious · fcb5380fe09a1ade

MALICIOUS

PDF

83.5 KB Created: 2021-09-05 21:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: c9b1aaa2123b0a38eeb2c00411943b9f SHA-1: a7c5e05392b2d5ddf0927da300a0b67388d751bd SHA-256: fcb5380fe09a1ade233822e8cd47f6a5d3824739c4ba3b16f136541ba486383a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links to external websites, many hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://zap-interactive.com/uploads/files/98784418662.pdf In PDF document text
- http://locthanhroyal.com/upload/files/dafefukafow.pdfIn PDF document text
- http://dellalontra.it/userfiles/files/33505930988.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/33c5334ab228586631cc085b7a345992/dugiw.pdfIn PDF document text
- https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3262f2cf8a---92639482646.pdfIn PDF document text
- http://abwingscolley.com/uploads/files/muzevuwilutuxovo.pdfIn PDF document text
- https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608319fd915d0---20147153348.pdfIn PDF document text
- http://cleangroupbd.com/ck/upload/files/zeporudalanuxevisis.pdfIn PDF document text
- http://studiotecnicobonoli.com/userfiles/files/35176448158.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1610656d618122---mewezesisilinaporaxajetu.pdfIn PDF document text
- https://5a.ro/ckfinder/userfiles/files/64965977701.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609663032e4c0---974596844.pdfIn PDF document text
- http://texinpack.com/uploadfile/file///2021073007305750.pdfIn PDF document text
- https://allianztc.ro/files/file/60489539296.pdfIn PDF document text
- http://copy2d.com/ftp/image/file/80928079945.pdfIn PDF document text
- http://podlahypilat.cz/admin/file/gopifezu.pdfIn PDF document text
- https://sealordhotels.com/ckfinder/userfiles/files/53793483027.pdfIn PDF document text
- https://artgallery.devctn.com/ckfinder/userfiles/files/vijoperezipugokizowexeg.pdfIn PDF document text
- https://asthasupermarket.com/userfiles/file/54282012459.pdfIn PDF document text
- http://loscogliodifavignana.it/userfiles/files/zijogikiwil.pdfIn PDF document text
- http://dawahcity.com/userfiles/file/27299542137.pdfIn PDF document text
- http://jrpst.pl/userfiles/file/62989491441.pdfIn PDF document text
- http://toyteepee.com/uploadfiles/file/210626210915970338mbhu20.pdfIn PDF document text
- http://tandartsindex.nl/images/uploads/42551227920.pdfIn PDF document text
- https://adasms.fr/userfiles/file/lekuxozozivorusoru.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=holistic+approach+of+environment+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_off0000e135.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE135	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f94c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF94C	10940 bytes
SHA-256: `fd215b9a14bde14e20a6b118dd7979d5225c7bd32700ca67e4c35a534e7fad1c`
`font_02_sfnt_off00011275.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11275	17760 bytes
SHA-256: `851def964b693b592f8e5a34ed72ec8777ce986695da68001168f277584503b8`

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