Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7dd0ee221c213c…

MALICIOUS

PDF

93.0 KB Created: 2021-06-05 18:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c403e90970d2fb30d0fa701a3e1d6c9b SHA-1: ed3a2ab4aa26c17b0d03a97515cec82fa6868a72 SHA-256: fb7dd0ee221c213c5283c780a17ed2690e3fa06d0562564a33f54c4c670cc9b0
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded content appears to be obfuscated, but the presence of external URIs and the overall structure strongly suggest it's designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://coretry.ru/pbw?utm_term=verizon+tablet+ellipsis+8+price+in+pakistan PDF link annotation
    • https://pikivazok.weebly.com/uploads/1/3/0/8/130873779/2486245.pdfIn PDF document text
    • https://jibametugo.weebly.com/uploads/1/3/4/4/134486067/6d439547ff563a0.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4461751/normal_60b6cd5a337b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388416/normal_5fde5bfc87719.pdfIn PDF document text
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/famoziwovetexo_kogibofuvezuxuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5fea32405f174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_5fe8f360620a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376098/normal_5ff4e116b5c46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476943/normal_5ffd5367c8348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_60547e8e024c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408186/normal_5fe82e1bcb4e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_606b613588e49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466172/normal_6058b5731c013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496001/normal_605d874e2c597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423772/normal_5fed489a5162e.pdfIn PDF document text
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/gutamidomen.pdfIn PDF document text
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/juzekek.pdfIn PDF document text
    • https://winalefis.weebly.com/uploads/1/3/3/9/133999417/822556f51a05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33ad847-8dcd-4fff-8a62-ad58026482e7/38408749869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081bb2b5-015a-4418-8720-26859b3edbd9/daikin_remote_manual_arc452a4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a88d43-da73-4d03-bca8-81320f854e70/43520201607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ea329a-75d7-42e4-9d6a-05efea1e8fa0/butuzugi.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_off00012a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6A 5340 bytes
SHA-256: cdfa55bbc3481947a0a4493ead893e3337c0e3fb70c89e76ba4b8c33b1fe2c2c
font_01_sfnt_off00013caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAA 11712 bytes
SHA-256: a85e61f6cd78b4f09c9956a10893ad84f650691ee78b305d01e5aa4932792b26