PDF malware analysis — malicious · 26dbbf9d8d2fba11

MALICIOUS

PDF

90.3 KB Created: 2021-09-09 02:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 959cc88af53630cde4653201cda090a8 SHA-1: 01f4f6dd7cb3e2ce85dcf722212fdd38f073b50c SHA-256: 26dbbf9d8d2fba11e4d03cac5dd31e900cc717d91e2ce76b3dddaee16c549ae7

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, containing embedded JavaScript and a large number of external URIs. The presence of embedded JavaScript (T1059.007) indicates potential for malicious code execution within the PDF viewer. The numerous links to disposable hosting sites suggest a phishing or malware distribution campaign, likely delivered as a spearphishing attachment (T1566.001).

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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
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
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://garglob.ru/uplcv?utm_term=after+the+game+abbi+glines+pdf PDF link annotation
- http://texinpack.com/uploadfile/file///2021090120324120.pdfIn PDF document text
- http://hopkim.vn/upload/files/danudijatowopuva.pdfIn PDF document text
- http://strahovka66.ru/userfiles/file/98924895270.pdfIn PDF document text
- https://mexico-airport-transfers.com/ckfinder/userfiles/files/wivajowekobozilezuxe.pdfIn PDF document text
- http://vatlieubaooncachnhiet.com/userfiles/file/jelitibulosadakebuga.pdfIn PDF document text
- http://firmen-bekleidung.at/userfiles/file/feduvidofafapexepamunarid.pdfIn PDF document text
- http://soc-in.com/data/media/files/35593024317.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613864a9e1e04---95877977315.pdfIn PDF document text
- https://hkfew.org.hk/ckfinder/userfiles/files/jemosometoxudud.pdfIn PDF document text
- https://illustrations.noche.fr/images/files/sirovedaxebobiwitojofeli.pdfIn PDF document text
- http://www.mbk-montage.nl/ckfinder/userfiles/files/bajalozidutopuwog.pdfIn PDF document text
- https://playerpress.com/ckfinder/userfiles/files/47777270975.pdfIn PDF document text
- https://kisikana.hr/UserFiles/files/vifegurevumim.pdfIn PDF document text
- https://ppuhperspektywa.pl/files/edytor/file/82420906742.pdfIn PDF document text
- http://imdmotors.com/uploadfile/file/2021090407155945.pdfIn PDF document text
- https://chinatupai.com/web/js/ckfinder/userfiles/files/gazomijipag.pdfIn PDF document text
- http://reopen911.info/media/file/luram.pdfIn PDF document text
- https://pomacanthe-art.fr/imagebeforeafter/files/fegusifapogalon.pdfIn PDF document text
- http://arc-en-cielproduce.com/ckfinder/userfiles/files/badimuveke.pdfIn PDF document text
- http://casier-a-bouteilles.fr/file/86113179566.pdfIn PDF document text
- https://taybaite.com/userfiles/file/somurinajivelebefaze.pdfIn PDF document text
- http://ydis.kr/userfiles/file/081436183496.pdfIn PDF document text
- http://fc-junajted.com/upload/datoteke/wowipoxe.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/1rn3tv1hcq4tmdfc73bm0mib5g/97663504238.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_off0000fa82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA82	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011294.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11294	18548 bytes
SHA-256: `b5feff620242d5a50088a858d761f1c627ac6f088ab3145405c2943b4887b25e`
`font_02_sfnt_off00014198.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14198	10948 bytes
SHA-256: `f031086fde4e6907f7b852c99d3fd93990fb590bd6f3c72525d35169f6dd4b83`

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