Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc7293679207bcc…

MALICIOUS

PDF

128.5 KB Created: 2021-01-29 04:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 450bfda1547dae1d63c6c4d108b9cd90 SHA-1: 346d7d13f96af76508d5b68a123bc72809c14d74 SHA-256: cdc7293679207bcc947a4e450d367172b948cf532aa10483b9f9d77a8723b1df
236 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous external links, many of which are disguised as legitimate documents, suggesting a link farm or phishing attempt. Heuristics indicate a lure for browser extension installation and a password-protected archive, common social engineering tactics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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.
  • 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
  • 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://bologen.ru/aws?utm_term=mozilla+firefox+version+47 PDF link annotation
    • https://cdn.sqhk.co/nugopanage/vHfwjcw/edit_photos_and_videos_together.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468553/normal_5fe26fcf93b5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418565/normal_5ff889c48afbf.pdfIn PDF document text
    • https://cdn.sqhk.co/zixapegof/hbjjjb7/buxazegirakage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5fec7b4e44b12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478123/normal_5ffa95646bd8f.pdfIn PDF document text
    • http://sentytld.online/kesumojuwunetorofisezob66q1c.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/44822da9a.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/a318861a8478b.pdfIn PDF document text
    • https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/lolis.pdfIn PDF document text
    • http://100naturals.fun/digidesign_mbox_2_driver_macegpnm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454055/normal_5fc8c398ada37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fca327ece8b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444377/normal_5fd66e6a137d0.pdfIn PDF document text
    • http://dietnatur.fun/meme_sound_meme_soundboardxz013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_5fe0e728db2a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_5fd17dd318fee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B552 5112 bytes
SHA-256: eb8ef3dcda100091da601d143affadce7608aa1a2187393c0b4ca5be05c870c5
font_01_sfnt_off0001c6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6F4 14240 bytes
SHA-256: 4d473f94e265944309c19660c0ea96620f2eae4262f3b7a6ec0c9df180f05e40

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