PDF malware analysis — malicious · af698935e7c85fba

MALICIOUS

PDF

79.5 KB Created: 2021-09-22 23:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 7dd83aadfc4fdf22ae36f757b8b55741 SHA-1: ee69956bef977d06cd0308b6df4c593cd1b18edd SHA-256: af698935e7c85fbaf81377caee3f5e9cf6428c74c95849b319378e16169c9b7d

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains or IP addresses, indicating a likely attempt to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 6

Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL

PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
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://crysiq.ru/uplcv?utm_term=where+to+hide+pictures+on+your+phone PDF link annotation
- https://fotografski-studio.kost.si/userfiles/file/30377278505.pdfIn PDF document text
- http://casadiriposomarsala.it/userfiles/files/25532224040.pdfIn PDF document text
- http://esoftland.com/userfiles/file/57940900199.pdfIn PDF document text
- http://studiosimonepantaleo.it/userfiles/files/13728025915.pdfIn PDF document text
- http://yourmoneyyourbank.com/uploads/File/newokuvosusej.pdfIn PDF document text
- http://konstruktor33.ru/app/webroot/files/files/viniretibivedububi.pdfIn PDF document text
- http://cestovni-postylka.eu/userfiles/file/bafigerisujuno.pdfIn PDF document text
- http://www.pilartangguh.com/file/57719552565.pdfIn PDF document text
- http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/66344776522.pdfIn PDF document text
- http://ping-property.com/user_img/files/40672317789.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161465e58bee74---82054202392.pdfIn PDF document text
- http://hotelborgodeipoeti.com/userfiles/files/40524140399.pdfIn PDF document text
- https://ecohort.biz/userfiles/files/diwowujajidawagalidawavi.pdfIn PDF document text
- http://youngthisyear.com/ckfinder/userfiles/files/golidedinu.pdfIn PDF document text
- http://studiogallerani.it/userfiles/files/69249372982.pdfIn PDF document text
- https://remont-bez-zabot.ru/files/file/sulusexabifamawanak.pdfIn PDF document text
- http://eastcity.hu/ufiles/file/rikunazevatoso.pdfIn PDF document text
- http://azseal.net/uploads/userfiles/file/28536028190.pdfIn PDF document text
- http://petukmahaaaraj.com/userfiles/file/75638890454.pdfIn PDF document text
- http://www.bargiel.com.pl/ckfinder/userfiles/files/41993542597.pdfIn PDF document text
- http://kuresi-kaitori.com/upload/content_pic/files/27110302626.pdfIn PDF document text
- https://alansglobalservices.com/ckfinder/userfiles/files/satenojuxidenepetupiguve.pdfIn PDF document text
- http://oio.cn/uploadfiles/files/58161932339.pdfIn PDF document text
- https://xlspandoek.nl/userfiles/file/waposisona.pdfIn PDF document text
- http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/ziwojujatasaremegaf.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_off0000d24e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD24E	17444 bytes
SHA-256: `c139588a9528d62f289dbd12671d3513ddd77e5abe32c1c9374ae7eac2c333b0`
`font_01_sfnt_off0000ffb7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFB7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000117ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117CE	10612 bytes
SHA-256: `dd91172bf9bfe5a2c4b7d6838835b85d3efa8a0aec1deee6fe316c2e66733305`

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