PDF malware analysis — malicious · b65ab6a56eaf778f

MALICIOUS

PDF

76.7 KB Created: 2021-09-18 10:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 97c009eff5eaddf2fe0354eb0c64ee42 SHA-1: cfe091c7fc75b5ab2f2439cfc4705c1443d3c0b2 SHA-256: b65ab6a56eaf778f0abf8ac996b06824871af92586ae11935108f22225fb29bd

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, including a link farm on disposable hosting, suggests the document is designed to redirect users to malicious sites. The embedded JavaScript likely facilitates the exploitation of vulnerabilities or the execution of further malicious code upon opening.

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
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=voice+training+pro+apk PDF link annotation
- http://tythb.com/uploadfile/files/mizavebowatodugomijaxiga.pdfIn PDF document text
- https://bhopalliteraturefestival.com/mpsdp/uploads/files/xoxawo.pdfIn PDF document text
- https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/0682b818f795b26a14e413d2f069be93/43475273416.pdfIn PDF document text
- https://fullgame.hu/uploads/files/jesabolota.pdfIn PDF document text
- https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/803c9225875ab1fa835bdefb239e225a/29667525905.pdfIn PDF document text
- http://droneducational.com/admin/userfiles/file/31733394558.pdfIn PDF document text
- http://itcbeautytrainingschool.com/userfiles/file/patijapodulotibeluwed.pdfIn PDF document text
- http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19850252932.pdfIn PDF document text
- https://houstoncoinshow.org/FCKeditor/file/11751782471.pdfIn PDF document text
- http://circolonauticofavignana.it/userfiles/files/lemiwigugo.pdfIn PDF document text
- http://www.gdchgs.com/admin/img/files/kurefanopobapujolegif.pdfIn PDF document text
- http://quimis.net/js/ckfinder/userfiles/files/85243173295.pdfIn PDF document text
- https://rm-parketi.si/uploads/gujavipuwabeto.pdfIn PDF document text
- http://greenearthgardens.org/userfiles/nomadizofi.pdfIn PDF document text
- http://toyotarent.tw/FileData/ckfinder/files/20210903_843CCCF96AE67BF9.pdfIn PDF document text
- https://nmcs.ca/userfiles/files/3905925034.pdfIn PDF document text
- https://distriparkbotlek.nl/userfiles/files/54272504117.pdfIn PDF document text
- http://veterinariacomportamentale.it/userfiles/files/26648837748.pdfIn PDF document text
- http://flirtproducties.nl/ckfinder/userfiles/files/lowibimizutapevoxal.pdfIn PDF document text
- https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/kajezegutu.pdfIn PDF document text
- http://gradn.ru/uploades/fckeditorfile/62040027731.pdfIn PDF document text
- http://faizleathergloves.com/userfiles/files/23100949678.pdfIn PDF document text
- http://soeurs-scjboran.fr/soeurs/upload/files/40477838010.pdfIn PDF document text
- http://historia-bfured.hu/userfiles/file/funarukajazoturaderezisuk.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_off0000c778.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC778	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000df8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF8A	17792 bytes
SHA-256: `ea8f2f0b3c88f24f40485bf353f2cecb035e07c6977c50050aebff6b1764b744`
`font_02_sfnt_off00010d99.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D99	10396 bytes
SHA-256: `5975d6dcd2e029a56560b8e4fabf4bf5790549573f83fd1068a612dedfa0e0d2`

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