PDF malware analysis — malicious · 557f53193617f209

MALICIOUS

PDF

81.7 KB Created: 2021-05-26 07:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 5cee413c49c05d98e2cfc03eb2f81c0e SHA-1: 531c13a024968698ac711f75bd1ca3af204d2078 SHA-256: 557f53193617f209347f7764405cc9a7691d0bbf6b219bdf63b29005f1ff1bce

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive 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 0.9996

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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.
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://lozipotod.ru/strik?utm_term=how+to+get+element+3d+license PDF link annotation
- https://static.s123-cdn-static.com/uploads/4448113/normal_60089d719bc28.pdfIn PDF document text
- https://jarajegixam.weebly.com/uploads/1/3/1/4/131437089/6fd962f.pdfIn PDF document text
- https://laxivaxof.weebly.com/uploads/1/3/0/8/130874385/kawelerukulotokopigi.pdfIn PDF document text
- https://kakifiku.weebly.com/uploads/1/3/5/3/135347754/supapi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420752/normal_601cbbeb75aeb.pdfIn PDF document text
- https://bapajoronugenig.weebly.com/uploads/1/3/4/2/134234589/wozoroxavopepajek.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390642/normal_60127a83e6069.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4406464/normal_5fdeb5a60273a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4480170/normal_5ff8eeeaf2995.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367646/normal_600c0479c88c8.pdfIn PDF document text
- https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/porogivogomifeletine.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370543/normal_6028f391c44e6.pdfIn PDF document text
- https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/1511800.pdfIn PDF document text
- https://fulimutalez.weebly.com/uploads/1/3/4/5/134599943/kuragupo-pibenarosukid.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414152/normal_6063a893b7942.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414689/normal_603f78077ffba.pdfIn PDF document text
- https://repamepofasepa.weebly.com/uploads/1/3/1/4/131437198/waxuzaxidikuposevez.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://uploads.strikinglycdn.com/files/02eff86f-b0e4-4c5d-8948-26c941d981f8/ver_pelicula_el_dificil_arte_de_amar_online.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bbb0e811-2df5-4e18-a575-e3f778333622/how_many_pages_is_the_pmbok_6th_edition.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/00ab794d-f7d0-45b0-9b21-284d0e7c2eba/dbt_mindfulness_worksheets.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eab8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAB8	4960 bytes
SHA-256: `8126697bcf4ea87c4993e225d3e758b88cdd848594a18f71535a454a6dfb3ff0`
`font_01_sfnt_off0000fb8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB8D	1800 bytes
SHA-256: `51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0`
`font_02_sfnt_off0001041b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1041B	11320 bytes
SHA-256: `515af1e39a691e07aa949330e34e99e0ec046754275bd79a67be5869b28c1a0c`
`font_03_sfnt_off00012a8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A8C	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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