PDF malware analysis — malicious · 8119f2aad00d1273

MALICIOUS

PDF

91.7 KB Created: 2021-09-07 01:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: e2a02aa32d352ca27668fa572b10c8fa SHA-1: ccb05a0220e07307b2cbf53710834485b13cd91f SHA-256: 8119f2aad00d1273df90b7bbb2fd2e28051890a810391ec74b832fd7dee2c6b2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites, which is a common tactic for phishing or malware delivery. The presence of numerous external URIs and compromised CMS upload links supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://hearing-outlet.com/uploads/files/202108131135013039.pdf In PDF document text
- https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/8918e6509decca00258968e564c9e19f/nimebabesuxozon.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/e9cff58ef296447c30796ff27d4899f0/45563769159.pdfIn PDF document text
- http://chipublichouse.com/ckfinder/userfiles/files/wapelolit.pdfIn PDF document text
- https://taksis.lv/taksis/userfiles/file/93167073798.pdfIn PDF document text
- http://elsekmont.eu/userfiles/file/97078240306.pdfIn PDF document text
- http://tai-group.com/upload/files/86597525519.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/wimazisobojamoloropifeso.pdfIn PDF document text
- https://piuspvc.it/userfiles/file/40295922967.pdfIn PDF document text
- http://www.mecateengenharia.com.br/ckfinder/userfiles/files/72135380054.pdfIn PDF document text
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/5b8fa7b6c5cd3f4516a2587136eb5e23/rosozexemape.pdfIn PDF document text
- https://weeb.nu/userfiles/file/xetozabibafoputetusegib.pdfIn PDF document text
- http://jfe.hk/userfiles/58685296919.pdfIn PDF document text
- http://china-engine.net/ckfinder/userfiles/files/fubedogekus.pdfIn PDF document text
- http://10glazsikeyrosa.ru/file/12031178572.pdfIn PDF document text
- https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/04b17e9ddf9a053e7946a33afb9c9daf/28483029886.pdfIn PDF document text
- http://blankheich.de/images/uploads/file/fagudoxalavinatixog.pdfIn PDF document text
- http://snp-ent.com/files/fckeditor/file/84304012361251ae632f1b.pdfIn PDF document text
- https://nocenzura.space/web/img/podborky/files/10114010311.pdfIn PDF document text
- http://france-ex.com/images/blog//file/vefisimifovijoziw.pdfIn PDF document text
- http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1955307713612bb0b9a8816.pdfIn PDF document text
- http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609038e0ce5d3---14679456297.pdfIn PDF document text
- https://giritrademark.com/content_files/files/pabagowoviwomudavu.pdfIn PDF document text
- https://ou-ravda.com/ckfinder/userfiles/files/35463715683.pdfIn PDF document text
- https://exihomes.com/userfiles/files/narebi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=materi+genetika+kelas+12+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_off0000ffaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFAA	10812 bytes
SHA-256: `368c363e7bcd642efe85bd3dd00b0a2a67f3c204c7d9cb286d054980c89d7b33`
`font_01_sfnt_off00011898.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11898	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000130aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130AA	18364 bytes
SHA-256: `2120c29a3d15d822b0d0e4a1b555bc035a1daa2009394c3386a1c0c75ee9a459`

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