PDF malware analysis — malicious · c46fa1fc7c7b7064

MALICIOUS

PDF

103.6 KB Created: 2021-02-18 07:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: fc885930bd982682f6a76a19aa3e7b9f SHA-1: b2648ad251bc74df0a7a55ea22a6f8c6e4cf437e SHA-256: c46fa1fc7c7b70644c5a30a0f9f0e51f72238ddd6e178341e468c8e44e4455cc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. One prominent URL, 'https://jacksth.ru/wix?keyword=messenger+apk+latest+version+for+kitkat', suggests a lure related to downloading software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

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 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.
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://jacksth.ru/wix?keyword=messenger+apk+latest+version+for+kitkat PDF link annotation
- https://static.s123-cdn-static.com/uploads/4420028/normal_5fcd02a32d51f.pdfIn PDF document text
- https://fibarivinudew.weebly.com/uploads/1/3/5/3/135387866/73a31efb7a8.pdfIn PDF document text
- https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/7736983.pdfIn PDF document text
- https://jopixumux.weebly.com/uploads/1/3/4/7/134734794/5673493.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484399/normal_600f40066149d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4487184/normal_5fcf03e3754de.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388611/normal_60109be9c547f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409258/normal_6016925ba9f14.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4385869/normal_5fe3102591443.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388271/normal_602d9e6e8f74d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449178/normal_5fff802a795bc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4461770/normal_5ffff71f882ed.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/vufupu/dmc_full_form_in_medical.pdfIn PDF document text
- https://s3.amazonaws.com/xumakomowi/game_guardian_no_root_apk_apkpure.pdfIn PDF document text
- https://s3.amazonaws.com/venunamazozuzo/pagafasokorizuxelegemor.pdfIn PDF document text
- https://s3.amazonaws.com/lanaladu/maintenance_report_document.pdfIn PDF document text
- https://s3.amazonaws.com/fapaga/fejam.pdfIn PDF document text
- https://s3.amazonaws.com/duzexefemosaxe/5705375682.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
- http://scripts.sil.org/OFLIn 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_off0000ea16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA16	6832 bytes
SHA-256: `d3108faf9f6a8a7872c74692c507300d53e7a290d8a227f042fb1b17f58fbaf4`
`font_01_sfnt_off0000fb65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB65	4984 bytes
SHA-256: `2c581460ca2bda2989c46cbd4ca23a74308dea4163c1a15a81e1c66145afdddf`
`font_02_sfnt_off00010c6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C6B	20224 bytes
SHA-256: `7c80e47d6dad260c6294e30b0e93143512675bbec43317ca8a9c3dfcf513baa5`
`font_03_sfnt_off0001472e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1472E	10340 bytes
SHA-256: `c51bd5f0909f517b2fd79a5921e0d0c1a092c9de8e6822908dee5c3e152cf893`
`font_04_sfnt_off00016acb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16ACB	16604 bytes
SHA-256: `b5378d900db20fec8dd31bd3d333ae4c18cf2c4ea09c773eaf5c8850f90b0b14`
`font_05_sfnt_off00018128.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18128	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

Open this report in the interactive analyzer, or submit your own file for analysis.