PDF malware analysis — malicious · 563f7dcfe244e860

MALICIOUS

PDF

83.0 KB Created: 2021-09-11 00:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 5d5f2527afc008163c5b6e5ce9066b58 SHA-1: 790f0b88e15abd660f6e9cecd6daa4a15045089c SHA-256: 563f7dcfe244e860052293597a33d55dd9f45af18f1bc70d857e3b3ada5d4a34

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and links to compromised CMS uploads, indicating a likely attempt to redirect users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern suggests 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 https://catamma.ru/uplcv?utm_term=sciatic+nerve+flossing+pdf PDF link annotation
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613221cecb1fb---1085748537.pdfIn PDF document text
- http://ajivikafinance.com/userfiles/file/seteposapab.pdfIn PDF document text
- http://laihoawedding.com/app/webroot/upload/files/xidugofokanafafun.pdfIn PDF document text
- http://birizgardenhotel.com/userfiles/file/xaduwivodup.pdfIn PDF document text
- http://rassadaspb.com/new/files/file/63639618378.pdfIn PDF document text
- https://www.hkha.com.hk/ckfinder/userfiles/files/61992110805.pdfIn PDF document text
- http://1666-3668.com/attach/userfiles/file/gevavoxejelakegunibebez.pdfIn PDF document text
- https://nada70.org/userfiles/file/tinuzibitujoduxigokokaw.pdfIn PDF document text
- https://mashtalkandil.com/userfiles/file/fezotosobavabinosivut.pdfIn PDF document text
- http://hoteldanang.com/uploads/images/files/69420793174.pdfIn PDF document text
- http://ferrocom-spb.ru/userfiles/files/14272668157.pdfIn PDF document text
- https://footballsod.com/images/ck-uploads/files/wusadopezixed.pdfIn PDF document text
- https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/pebikevixazewuma.pdfIn PDF document text
- http://digitalpolicycouncil.org/imagenes/file/sorurefibafisotab.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/89e1cdb3df2666be18cd12d47b8b9c89/65548938754.pdfIn PDF document text
- https://inijariku.com/ckfinder/userfiles/files/jotapupiwirudeganogesin.pdfIn PDF document text
- https://congchungnguyenlieu.vnpec.xyz/uploads/files/60548718161.pdfIn PDF document text
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/79aab0c2dac311f471b828454fc1dd19/16112668997.pdfIn PDF document text
- https://prcomponents.com/ckfinder/userfiles/files/2653627327.pdfIn PDF document text
- http://impactpluslearning.com/ckfinder/userfiles/files/97566908268.pdfIn PDF document text
- https://namkhoasaigon.vn/web/images/files/kepilorobaxopisisasiviw.pdfIn PDF document text
- https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7814ncgbtqngck0u7satt0tqj3/govedetuvopakekejapod.pdfIn PDF document text
- https://vhssirimpanam.org/ckfinder/userfiles/files/ziwibunonupokedovedivib.pdfIn PDF document text
- https://thuaphatlaihoanghuy.com/uploads/files/debelukigomulaku.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_off0000df4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF4C	17464 bytes
SHA-256: `d8b5c07f83d5535de9d97a11ef3d79aa23b0323449cd044f9e2a3d2b69507af4`
`font_01_sfnt_off00010ce6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CE6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000124fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124FD	10936 bytes
SHA-256: `9e4c497b0b2d8b1e9caa351970e17a72bf72a00f1cc22d3e1e424f1104c3c8b6`

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