Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13762002e980586…

MALICIOUS

PDF

97.7 KB Created: 2021-06-10 08:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 307e96a0cd64dcb3d8b933c0b270ccfa SHA-1: bdaa0fa5a57fe909e5b2f953c998915ddfd277e7 SHA-256: a13762002e980586fdee1419c018b38ac4f17bda9fdd51dbdafdf4d5cef3f25a
186 Risk Score

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 0.9992

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://philabc.ru/pbw?utm_term=barbie+and+the+magic+of+pegasus+full+movie+in+english PDF link annotation
    • https://tijoramamuguko.weebly.com/uploads/1/3/5/3/135390581/6159178.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/9516774.pdfIn PDF document text
    • https://dedarapovoxorag.weebly.com/uploads/1/3/4/7/134748910/1812203.pdfIn PDF document text
    • https://mojijunu.weebly.com/uploads/1/3/1/0/131070220/wiribin.pdfIn PDF document text
    • https://jefabulovonaju.weebly.com/uploads/1/3/1/4/131438419/bekogekaxev_balifif_mavalil.pdfIn PDF document text
    • https://kexeluki.weebly.com/uploads/1/3/4/6/134627649/10be474e.pdfIn PDF document text
    • https://xowedoditigivi.weebly.com/uploads/1/3/4/7/134714126/9fb3e56.pdfIn PDF document text
    • https://tamukatiraf.weebly.com/uploads/1/3/4/7/134766395/tokav_seranoxazifoni.pdfIn PDF document text
    • https://jatisarekitikez.weebly.com/uploads/1/3/4/6/134661612/gasopixu-puxitedamarapun.pdfIn PDF document text
    • https://koworuvixoduto.weebly.com/uploads/1/3/4/3/134352933/sozelawuvefaval.pdfIn PDF document text
    • https://dupuzebor.weebly.com/uploads/1/3/4/6/134639309/bojawoledir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387825/normal_5fcc65023cd21.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/zogis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486365/normal_606bd3acd88c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411916/normal_5fd1778aecfc2.pdfIn PDF document text
    • https://xamifixi.weebly.com/uploads/1/3/1/8/131871938/gatipamov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_60265290a073d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5feaf378ea758.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zetewufor.pbworks.com/w/file/fetch/144803358/how_do_you_make_charcoal_briquettes_locally.pdfIn PDF document text
    • http://wesupumus.pbworks.com/w/file/fetch/144668898/hinario_caboclo_guerreiro.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/w/file/fetch/144466563/veronica_full_movie_free_download_in_hindi_filmywap.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 7300 bytes
SHA-256: 46346570fb6ed443a74a63d164044c9454dc8449fa31aea8cd917f8829ea4b24
font_01_sfnt_off000110a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A5 5816 bytes
SHA-256: abc4e618e27f7b6d2a2dbd029a0e2b7abff229287e8f9ba2978c6e38606db1b6
font_02_sfnt_off00012457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12457 16108 bytes
SHA-256: df3eee5a34f3f3a1dde33044228abff76b24d962e2d50f919708b8eb241ba329
font_03_sfnt_off0001561a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1561A 19948 bytes
SHA-256: f696bcc72b17d9bccd3a863852a2b5505165ed1ce9bbbaf5f07044fe13b79ffd