PDF malware analysis — malicious · cb69097e050652ce

MALICIOUS

PDF

87.0 KB Created: 2021-09-19 14:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 0ce27fb9e518c438276db491cbeb32db SHA-1: a96124a675156f43ff07b140f5efef17151136c6 SHA-256: cb69097e050652ce87a06b72825bf68279b8f788a204084b1e8aa11355fabb90

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to a link farm, suggesting a phishing or malware distribution campaign. The PDF structure and embedded content indicate it's designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://lnyuanzong.com/uploads/files/20210908124714.pdf In PDF document text
- http://tccsrl.org/userfiles/files/6964999069.pdfIn PDF document text
- https://ashasuchikala.com/ckfinder/userfiles/files/52978002948.pdfIn PDF document text
- https://fcr-fomentoconsumoerenda.com/uploads/files/32318908980.pdfIn PDF document text
- http://t-eamplus.de/web/editor/files/bisusofupuloti.pdfIn PDF document text
- https://fier-forjat-valimet.ro/ckfinder/userfiles/files/47776135989.pdfIn PDF document text
- http://meruzhankhachatryan.com/app/webroot/files/file/78214726075.pdfIn PDF document text
- https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf44b1bf6c---ketikotufadimepevavoje.pdfIn PDF document text
- http://12shio5.com/contents/files/66470264457.pdfIn PDF document text
- http://www.gamylai.vn/uploads/files/26974482525.pdfIn PDF document text
- http://altus.pl/userfiles/file/jofemofofazuxedopowenasob.pdfIn PDF document text
- https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/ninilazikamozugan.pdfIn PDF document text
- https://adetexfoamgroup.centralcms.cloud/galeria/files/kazunixojoba.pdfIn PDF document text
- https://hyosungulf.com/uploads/file/naxapininelajilil.pdfIn PDF document text
- http://licausi.it/userfiles/files/8914762862.pdfIn PDF document text
- http://kamnitikamini.si/upload/files/84251364771.pdfIn PDF document text
- http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/47253757850.pdfIn PDF document text
- http://orikon.net/Images_upload/files/lebabebowijesegupukub.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613942801cfa4---xukomizonixupefopomovumel.pdfIn PDF document text
- https://accidentmatters.com/ckfinder/userfiles/files/17373766567.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=android+internet+history+folderPDF 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_off0000ef36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF36	10384 bytes
SHA-256: `f672db1d6f3f97b57c0c542b87900eb0ce4a2a6ca7c111374c65639fc0786dde`
`font_01_sfnt_off000106a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106A6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011eb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EB8	18312 bytes
SHA-256: `1c2e43696d17f98aaa89f08e385ab038ecaa75279fccc0dc22e667b947b7d78b`

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