PDF malware analysis — malicious · f0ee400db64f5ea1

MALICIOUS

PDF

70.0 KB Created: 2021-09-27 12:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 07c8ae42da1f27ae8f1579f64864fad8 SHA-1: fd04ea6799b2239f66df1b5c27decb41f0fdda2c SHA-256: f0ee400db64f5ea134dccea6f81024990cb0e88c0f1cdcaddce7075245107226

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, often involving JavaScript for obfuscation or exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://smidgel.ru/uplcv?utm_term=psiphon+pro+211+unlimited+speed+apk PDF link annotation
- https://mosconi.net/userfiles/file/7951342891.pdfIn PDF document text
- http://sahamit.net/userfiles/file/3888920234.pdfIn PDF document text
- http://sethhukumchandschool.com/userfiles/file/19037091437.pdfIn PDF document text
- http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wukepawolun.pdfIn PDF document text
- https://mimpishio1bet.net/contents/files/ladulomidagizod.pdfIn PDF document text
- http://nhatnamvina.vn/rich_editor/file/96493405603.pdfIn PDF document text
- http://maremio.ru/admin/ckfinder/userfiles/files/77727246289.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fd27a0546---wutavetibikowew.pdfIn PDF document text
- https://tucarrorentacar.co/ckfinder/userfiles/files/dukojodex.pdfIn PDF document text
- http://abbaorphancare.org/survey/userfiles/files/47457053313.pdfIn PDF document text
- http://donauwell.at/userfiles/file/gimilupozek.pdfIn PDF document text
- http://easyhypermarket.com/userfiles/file/begofapogobojos.pdfIn PDF document text
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/161412177c9e3a---38907033126.pdfIn PDF document text
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/g2b2k72s0b58uja0jusug7kb11/60310822668.pdfIn PDF document text
- https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/97535483096.pdfIn PDF document text
- https://repetitorebi.ge/userfiles/files/sijot.pdfIn PDF document text
- http://liebherr-tr.com/userfiles/file/26754798293.pdfIn PDF document text
- https://landbondcorten.com/attachment/file/b906d3b32a8c82f79240aaaa8a2d6480.pdfIn PDF document text
- http://saconsultancy.com/userfiles/file/36410782917.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7e2262c9e---66619603419.pdfIn PDF document text
- http://tiyuchangdi.com/upload_files/files/20210911_183816.pdfIn PDF document text
- http://ayurveda-shiatsu-nice.com/upload/files/9484900843.pdfIn PDF document text
- https://ivanda-commerce.hr/userfiles/file/98302842651.pdfIn PDF document text
- https://bodymason.com/user_uploads/files/vavujijususoxis.pdfIn PDF document text
- http://armanetti.com/images/nigiwol.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_off0000b2bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2BD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cad4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAD4	11024 bytes
SHA-256: `1381617351619e1d3be81669d48bc53592e5a61094ed5401ab53125358182aa3`
`font_02_sfnt_off0000e457.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE457	14964 bytes
SHA-256: `ecddff79096fc82a689900fd1e30fd5710d1c44984b32421548793a0801259e4`

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