PDF malware analysis — malicious · 19abc7dc552eaf92

MALICIOUS

PDF

62.3 KB Created: 2021-10-02 20:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 329a72e4a4320c1e03b7b969906d710d SHA-1: 61cc4927f2dd165636cb6616a682d12171fc24fd SHA-256: 19abc7dc552eaf927f5ba860b89424454e4030bfdc7a3e93d8381da0a0a5f484

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host a large number of links on disposable domains, likely for SEO manipulation or to distribute malware. The ClamAV detection further confirms its malicious nature.

Machine Learning

Nyx PDF Classifier suspicious score 0.4242

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
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=multiply+and+simplify PDF link annotation
- https://tomas-music.com/contents/files/62286012971.pdfIn PDF document text
- http://dinskayarealty.ru/media/file/ladejutijabetilupalejej.pdfIn PDF document text
- http://uptindia.com/newsimages/file///vemivugid.pdfIn PDF document text
- http://filipdegreef.be/uploads/files/99241521956.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/f1hicd28t92ehgl4jo9kq88t6t/tavezizuxamakoseduz.pdfIn PDF document text
- http://studiovalentini.eu/userfiles/files/72844615057.pdfIn PDF document text
- http://serextion2006.com/js/upload/files/kobijefomofazakavazow.pdfIn PDF document text
- http://asja-doll.ru/userfiles/file/pibabaz.pdfIn PDF document text
- https://micsys.in/userfiles/file/kamuj.pdfIn PDF document text
- http://onlytech-tunisie.com/userfiles/file/gemikumuzogulo.pdfIn PDF document text
- https://aarhuskortet.dk/images/file/5036098242.pdfIn PDF document text
- https://nepalipublisher.com/ckfinder/userfiles/files/36504052708.pdfIn PDF document text
- http://artin-intranet.com/ckupload/files/3534312305.pdfIn PDF document text
- https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/15412776725.pdfIn PDF document text
- http://bon-mar.com/fck_user_files/file/muvogujexuz.pdfIn PDF document text
- http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/rijitoresu.pdfIn PDF document text
- http://fujavietnam.com/images/Download/45617783668.pdfIn PDF document text
- http://vikingpaint.com/user_file/file/fojede.pdfIn PDF document text
- http://nesemlak.com/test/images/uploads/files/ludafaxasebemotavitudu.pdfIn PDF document text
- http://architettodrabeni.it/userfiles/files/dulalevo.pdfIn PDF document text
- http://fsnmmaterials.com/UPFILE/userfiles/files/77109037486.pdfIn PDF document text
- http://biometria.pl/photos_fck/file/74140189469.pdfIn PDF document text
- http://www.kymenhome-etsinta.net/tiedostot/files/zagikusekiw.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bec1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBEC1	10512 bytes
SHA-256: `30387ecbd4ca14db0e32d0e4c27cb95c93bd0905f080ad72d88eb14e2bddf10c`
`font_01_sfnt_off0000d69f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD69F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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