PDF malware analysis — malicious · 280072b4f0c633cb

MALICIOUS

PDF

77.2 KB Created: 2021-03-09 01:11:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: dc4cb0d9f83f464557af44c8e8d0bbc4 SHA-1: 73ec69be4ebca25df27470da141f5d8a5bc0cd42 SHA-256: 280072b4f0c633cb36795f2d62318aad596e2825cc9ee24120ce3cd6c11a0d5d

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm and a fake CAPTCHA lure. The embedded URLs, particularly those on fokemale.ru and resimpub.com, are likely used to host or redirect to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM suggests an attempt to obscure the true destination or host multiple lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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://fokemale.ru/123?utm_term=aptoide+pc++minecraft PDF link annotation
- http://resimpub.com/tememavoxojam7m4d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4497078/normal_5ffeb46178127.pdfIn PDF document text
- http://1xbets-regs.site/nipasevilunasebuxabeteri7mcd7.pdfIn PDF document text
- http://jubuvojikemipi.iblogger.org/bizerba_vs12d_manual.pdfIn PDF document text
- http://hempmap.ru/tunexa2s109.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391047/normal_603ea02ca1d79.pdfIn PDF document text
- http://clientbluebadge.com/strong_spas_madrid_pricest9vsk.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://zovebosovu.rf.gd/jazowodorezovigewigudab.pdfIn PDF document text
- https://s3.amazonaws.com/fizup/steel_magnolias_script_free_download.pdfIn PDF document text
- https://s3.amazonaws.com/nefagolom/new_york_yankees_injury_report_update.pdfIn PDF document text
- https://s3.amazonaws.com/zifilobesumafi/avery_18160_template_word.pdfIn PDF document text
- https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_9652566d919a4d25a1ccd5c825444dde.pdf?index=trueIn PDF document text
- https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_c64a6c512e3843748db929a451d000b0.pdf?index=trueIn PDF document text
- https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_c09905a2139b4884a703123691344d21.pdf?index=trueIn PDF document text
- https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_1885e7141a7443e4ae42a71e45dc6c35.pdf?index=trueIn PDF document text
- http://zefojebenodimu.rf.gd/how_to_access_backup_photos_on_android.pdfIn PDF document text
- https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_8c857644421e46deae12884f175f9445.pdf?index=trueIn PDF document text
- http://zuluvegutadetu.epizy.com/spreadshirt_app_android.pdfIn PDF document text
- https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_d98c1a00b0e646e09832dede0bffa7f8.pdf?index=trueIn PDF document text
- http://wilopomuba.epizy.com/13816065044.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_off0000e4a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4A3	4868 bytes
SHA-256: `a2398431af3cc19a9a77deac6d1cea687e56f7206591fa5e2f4ff890650e88fe`
`font_01_sfnt_off0000f507.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF507	10724 bytes
SHA-256: `77380fbdb33c44ea949fffa7f04169680feef19ef18de5342e2f1ec223dcd714`
`font_02_sfnt_off0001196f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1196F	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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