Malicious PDF — malware analysis report

Static analysis result for SHA-256 e440b061509789fd…

MALICIOUS

PDF

74.7 KB Created: 2021-06-07 08:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d1bf3909ff72abf946e1ec2a7e8ce491 SHA-1: 0b3dc9d26d4f9dbf03a16eb758314c7c326ba148 SHA-256: e440b061509789fdd2bcaf8399bd370a521623e5b58079dec114e9b2af8e202e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9999

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 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://garglob.ru/pbw?utm_term=hollywood+hindi+dubbed+full+movie+mp4+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501963/normal_60018058e6f64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495860/normal_5ff33b3989fef.pdfIn PDF document text
    • https://webexopugidoxog.weebly.com/uploads/1/3/4/3/134319438/40cfd5d79699c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370052/normal_5fe18216d5b4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_604ee05f0b617.pdfIn PDF document text
    • https://ganegekisawaji.weebly.com/uploads/1/3/1/4/131406809/gijamaresu-lomob-roxotogunobuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_601a5ba3bdf5a.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/bd47d7fd-d2e5-4472-a091-68671f3821cf/jufavu.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144651285/solibilejewex.pdfIn PDF document text
    • http://xegosigex.pbworks.com/w/file/fetch/144755907/wegimupukes.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144519606/jurnal_analisis_wacana.pdfIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144653415/gta_5_apk_download_for_android_psp.pdfIn PDF document text
    • http://pajinap.pbworks.com/w/file/fetch/144495699/sisataxivadirosebudu.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144518223/does_nate_love_annalise.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/w/file/fetch/144461226/9955164238.pdfIn PDF document text
    • http://mukonisu.pbworks.com/f/gexejut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3139b3e0-77ed-48c5-8db0-65f267cdb1f1/79792612947.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_off0000e430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE430 5544 bytes
SHA-256: f5ab9017226606519479cb2ea146c998b30f12876dfb6a2c8d5ea41f859848dc
font_01_sfnt_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 11540 bytes
SHA-256: 8422b146ded795590cf944cf0534a9d5cc6d67b9b651bb94ce0081529379e025

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