PDF malware analysis — malicious · 65ee0dfaa178a810

MALICIOUS

PDF

99.4 KB Created: 2021-04-05 16:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 621607358890d7c6ad98696411998aae SHA-1: 52aebd9fa12acdca4d3e47fc8b12a9069b8ffd7f SHA-256: 65ee0dfaa178a810ebe482ac5956ddc3d7181ad4cc3735469e78e3978781a80a

196 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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://maypoin.ru/award?keyword=english+to+japanese+dictionary+download+pdf PDF link annotation
- https://defupaga.weebly.com/uploads/1/3/2/6/132681490/9818796.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4478683/normal_6009893697006.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411229/normal_5fece6a83801a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495988/normal_603b36a57eff5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488569/normal_6049b8a09a9db.pdfIn PDF document text
- https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/f815ea62.pdfIn PDF document text
- https://nimekeboxiz.weebly.com/uploads/1/3/0/8/130873861/xudunosodokakot-resoxazaxepoku.pdfIn PDF document text
- https://gomosonu.weebly.com/uploads/1/3/2/7/132712120/mavokekunig.pdfIn PDF document text
- https://poxofosu.weebly.com/uploads/1/3/4/3/134308827/zatawegerot.pdfIn PDF document text
- https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/6c3c9592b.pdfIn PDF document text
- https://ponasamexow.weebly.com/uploads/1/3/1/3/131398296/zofunetoxab_desixu.pdfIn PDF document text
- https://ruwiderok.weebly.com/uploads/1/3/4/8/134891429/bixuduk-ferezisi-koxujefunapu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4466379/normal_5feb32a9357a7.pdfIn PDF document text
- https://pupupobinizoto.weebly.com/uploads/1/3/1/3/131384436/f1c7a0b9efb4.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://s3.amazonaws.com/rurosaveruk/cisco_packet_tracer_student_version_free.pdfIn PDF document text
- https://s3.amazonaws.com/fosagoba/puzopuwidajarunixabawala.pdfIn PDF document text
- https://s3.amazonaws.com/megodipewukitoj/89330029699.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/43d98a2e-6ab7-42ec-ac2f-256b08ff0242/fipadowipelusolunixam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cea6b4bd-500d-4e7b-81ea-4314249f8223/tulaji.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5759fed1-af87-45de-8e68-25eb78e68092/54598622283.pdfIn PDF document text
- https://s3.amazonaws.com/warapagefasovi/dell_studio_1737_cpu_upgrade.pdfIn PDF document text
- https://s3.amazonaws.com/dubiditiginowo/13013430718.pdfIn PDF document text
- https://s3.amazonaws.com/jebokizez/katikenunevubafizivikeb.pdfIn PDF document text
- https://s3.amazonaws.com/nitidadufetenu/56862019513.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://scripts.sil.org/OFLIn PDF document text
- http://www.gnu.org/licenses/gpl.htmlIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fc7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC7D	4432 bytes
SHA-256: `c904c81128ed48bc10c6de0ad868d5b5981000f41a30f289018209a78b9d211e`
`font_01_sfnt_off00010c2a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C2A	5644 bytes
SHA-256: `6c6b970bd2f5ec79bdc4dd161a0f8a4c4c12791a923b2ce3d0c0d15a9c1c44d7`
`font_02_sfnt_off00011f7a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F7A	6148 bytes
SHA-256: `4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157`
`font_03_sfnt_off00012f5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F5B	13208 bytes
SHA-256: `8801664f2b5246fb5bb362ed91dac2b0f5f68aa8462cad9543b0d6432831f23f`
`font_04_sfnt_off0001595a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1595A	16684 bytes
SHA-256: `4cd55fee6c52bbab32ed20b0b25846bff407090075fa0ab45dc9808449a8eeb0`
`font_05_sfnt_off000170b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x170B1	2832 bytes
SHA-256: `a12908a88df35a7e9eb57470e9a94a806bb52df392ce88a62d07cba2b79b9044`

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