PDF malware analysis — malicious · 1ea797613f7c3dd3

MALICIOUS

PDF

102.0 KB Created: 2021-02-07 12:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 7e96069aad89888f9a0606f2a010b871 SHA-1: 27473d7febe879ceb29d7955c03f99650fc18d76 SHA-256: 1ea797613f7c3dd31fa7521f64e1bbd54b63909e0612d09e54ff4ad074a6b86e

246 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, including a critical alert for recovery secret lures. It contains a large number of external links, many hosted on disposable domains, suggesting a phishing or SEO spam campaign. The embedded URLs and the nature of the 'recovery secret' request indicate an attempt to steal user credentials or sensitive information.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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://bologen.ru/123?utm_term=mst+cs+1570 PDF link annotation
- https://cdn-cms.f-static.net/uploads/4489975/normal_601b3d5495b8a.pdfIn PDF document text
- https://sadaxolofomet.weebly.com/uploads/1/3/1/4/131453623/wemitosenenubu.pdfIn PDF document text
- https://fotofewoxa.weebly.com/uploads/1/3/4/8/134849098/5658126.pdfIn PDF document text
- http://playmarket-online.com/freakonomics_movie_worksheet_answersidomu.pdfIn PDF document text
- https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/tevitepes-nabuvipu-zozilaxafolod-giretiragam.pdfIn PDF document text
- https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/letarijopaf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370059/normal_601463344010c.pdfIn PDF document text
- https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/1467017.pdfIn PDF document text
- https://podesasi.weebly.com/uploads/1/3/1/4/131437149/ca334bd.pdfIn PDF document text
- http://tersq.space/vusonawugeloxafrh92.pdfIn PDF document text
- https://sekojeti.weebly.com/uploads/1/3/4/5/134583019/7b24b730369.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4476582/normal_5fc7f6bfd218f.pdfIn PDF document text
- http://air-calm2.club/splash_screen_android_library9yzlc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4466411/normal_5fcddc7cba280.pdfIn PDF document text
- http://collegegraduatecentraldating.com/download_adobe_flash_cc_2017_crackttdrs.pdfIn PDF document text
- https://rumikupim.weebly.com/uploads/1/3/5/3/135310872/4025395.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
- http://paporoj.rf.gd/gugerelakoradoxeliwakorut.pdfIn PDF document text
- http://jabaxuzadowepep.rf.gd/disable_google_chrome_software_reporter_tool_gpo.pdfIn PDF document text
- http://viladanus.epizy.com/pikizi.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00014b9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14B9E	4264 bytes
SHA-256: `1b3d8b56663bbfcdf4700ad273e4f714d9734f6c05c3e9f6340661a88d68b890`
`font_01_sfnt_off00015a28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15A28	10200 bytes
SHA-256: `1163c2d7f61c6ce4d6de7e1a4bdcfe8917d8aa5d8a9f4b99ea970a814e8c8eef`
`font_02_sfnt_off00017cd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17CD9	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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