PDF malware analysis — malicious · c5dc2ba934ed66bd

MALICIOUS

PDF

86.4 KB Created: 2021-09-07 23:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 925bb2b7d70ee113db96d66c74ad21e6 SHA-1: b7d08b8a4d8fb1eaae182ab00600e34c17cda010 SHA-256: c5dc2ba934ed66bdac6b2630c50c28ada25ae7d67522e19fb81bbb3e1812d13c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are consistent with spearphishing attachments used to redirect victims to malicious sites.

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 https://archism.ru/uplcv?utm_term=libro+el+renacimiento+de+natalia+ponce+de+leon+pdf PDF link annotation
- https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/be8f1654f9746cb99ce47251dcfe843e/64247450136.pdfIn PDF document text
- http://densayhongngoai.com/uploads/userfiles/file/58551066361.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128b697d96be---30970486419.pdfIn PDF document text
- http://orvositudasbazis.eu/images/upload/file/bapepesosu.pdfIn PDF document text
- http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/kinobopimetuwivigabelo.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e43996298---71955761492.pdfIn PDF document text
- http://xn--b1akwe.xn--p1ai/userfiles/file/58988074647.pdfIn PDF document text
- https://egokituz.org/files/galeria/files/japolopuxadotam.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16076d86610856---pumabulopubofidadabu.pdfIn PDF document text
- https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/lll4kqhl31rvcd3grjiui82kgf/1053298882.pdfIn PDF document text
- http://szentimresiklos.hu/upload/file/zifuzokiroxadajedotuw.pdfIn PDF document text
- http://cgl.lu/userfiles/files/xobifegikopezezamupifo.pdfIn PDF document text
- http://moje-stranky.eu/userfiles/file/bivowagojomebiluf.pdfIn PDF document text
- https://emauto.lv/index/images/up/file/gopupami.pdfIn PDF document text
- https://dacinsara.ro/fckfiles/file/fegulepokewu.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/8474311a8597594414b88d99e1520411/giwukin.pdfIn PDF document text
- https://czus-lukasa.sk/userfiles/file/82565071657.pdfIn PDF document text
- https://baxsporthorses.nl/userfiles/file/xukupajifosesopevobasise.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a0728d8b9---60819308382.pdfIn PDF document text
- http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e39730935e---31640296948.pdfIn PDF document text
- http://gurolmumcu.com/userfiles/file/jipolofereligodanu.pdfIn PDF document text
- http://midesignvn.com/uploads/files/37387732122.pdfIn PDF document text
- https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/lf44fff4k9tme5gld1f63ir4m1/59525171315.pdfIn PDF document text
- https://mimpishio2.net/contents//files/11036095400.pdfIn PDF document text
- https://aartipalette.com/userfiles/file/24212909152.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_off0000e90e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE90E	10708 bytes
SHA-256: `f676f91d48ad2067d19592ff2de08546c8cb47e8f081e9067c4455d7408eb651`
`font_01_sfnt_off0001015c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1015C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001196e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1196E	19524 bytes
SHA-256: `8cdbb93f093b4ffc5953be663d91e15ccec0a549c39753e85f699243118e096f`

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