Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f95a0f04d11b600…

MALICIOUS

PDF

94.3 KB Created: 2020-12-31 12:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6b347430d3dd2c10060e2bb0b9448c0f SHA-1: 4ced9db143ed05f7f253838a5ab671307fb21ee2 SHA-256: 7f95a0f04d11b600274fbe7a05acd23f288aef86242e15d78bca98d3b41027f3
186 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 as malicious by ClamAV and an ML classifier. 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 0.9997

Heuristics 6

  • 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.
  • 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://trafficel.ru/strik?utm_term=best+formula+1+racing+game+for+ipad PDF link annotation
    • https://cdn.sqhk.co/duxajoje/TifjdUK/disney_princess_my_fairytale_adventure_pc_game.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/9497306.pdfIn PDF document text
    • https://paxepufa.weebly.com/uploads/1/3/4/6/134640660/5901112.pdfIn PDF document text
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/zutefatakezisus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484356/normal_5fe26c93eb345.pdfIn PDF document text
    • https://zejikato.weebly.com/uploads/1/3/3/9/133997407/b0247aeb.pdfIn PDF document text
    • https://famuzupowaja.weebly.com/uploads/1/3/1/4/131406758/ec48c9a46b4.pdfIn PDF document text
    • https://jegesasep.weebly.com/uploads/1/3/4/5/134502647/pigutituwovogimitux.pdfIn PDF document text
    • https://pafazemewo.weebly.com/uploads/1/3/4/5/134517711/388d9cd0bbec.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/demokidakob-tukebubifeju.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/wuwipu-talejiromepeb.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/vawoginele/endorsement_and_testimonial_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/91313390854.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/23873150991.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_off0001351a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351A 5576 bytes
SHA-256: 9072fd75b44824e77bebaee76096b208a57ab1012b4a59bf8f89c5d83bc468eb
font_01_sfnt_off00014801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14801 10688 bytes
SHA-256: 9c8d419ea12582eb3d0997df13f19086489a7004a92b39607624bafbf6551fd8

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