Malicious PDF — malware analysis report

Static analysis result for SHA-256 784390d283266a9b…

MALICIOUS

PDF

77.7 KB Created: 2021-01-16 00:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: efd9aaa6516ecb442719a9594806b7e8 SHA-1: 915090a28efc6963c684f523e8a58f8329c5e58c SHA-256: 784390d283266a9bd39571cdbeba9be76950dd11bc361837aa35c1bd6daf1ab6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, 'https://trafftec.ru/123?utm_term=ap+european+history+exam+format', is likely used to redirect users to malicious content or further phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=ap+european+history+exam+format PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368763/normal_5ff97acb02f9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371272/normal_5ffff300295fd.pdfIn PDF document text
    • https://site-1196452.mozfiles.com/files/1196452/65665383654.pdfIn PDF document text
    • https://site-1201024.mozfiles.com/files/1201024/simian_radio_automation_software.pdfIn PDF document text
    • https://site-1177329.mozfiles.com/files/1177329/scarfall_the_royale_combat_game_download_uptodown.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382949/normal_5fe5dfa88bdda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462736/normal_5fc3264b75fa7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5fca341b6806f.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/6590595.pdfIn PDF document text
    • https://site-1211821.mozfiles.com/files/1211821/vertigo_attack_when_waking_up.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366978/normal_5ffeb0c5ed1f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/mapetetim.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 5268 bytes
SHA-256: 5c6e605fd127d3e9db63502c8e5d203c96983d2088f693cd4c631b9db3260505
font_01_sfnt_off000105fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FC 10728 bytes
SHA-256: 5fcc7978950b3fe126470b71ae6a05d543cd763153bd1d92dbcb9c6ca1a0d4fe

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