Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8519ed8abe662e…

MALICIOUS

PDF

77.9 KB Created: 2021-03-11 22:21:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cf0b8c5f408f386413d848a21fb4aae5 SHA-1: de475cf111780f1ce7c7366ea06eac1796adbdbc SHA-256: 7c8519ed8abe662ec3b0c44285311f0ed6a0c277bc65ea1249f918ecfa0b3b01
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with several pointing to domains flagged as potentially malicious or part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=hexxit+crafting+guide PDF link annotation
    • http://gewututikame.getenjoyment.net/52757530829.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/rFKjdhg/48098328643.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/kuzapodigagijapobexave.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/SvdEehj/sumaxuboneromiguroje.pdfIn PDF document text
    • http://retenenu.iblogger.org/infecciones_alimentarias.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_6012962142f06.pdfIn PDF document text
    • https://cdn.sqhk.co/wemojezuvegi/bhhhe3P/little_slice_of_heaven_bakery.pdfIn PDF document text
    • https://guxodobozit.weebly.com/uploads/1/3/4/3/134333536/19e0696a9.pdfIn PDF document text
    • http://furafofuvobomu.22web.org/47714084491.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/disadvantages_of_technology_in_education.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_60387e415b853.pdfIn PDF document text
    • https://kidodekorabatet.weebly.com/uploads/1/3/4/3/134320193/7173ec718c8e.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/a7f265220726e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_5fda947d79be2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_601d31e65cf32.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/13c9a6.pdfIn PDF document text
    • http://rabatil.22web.org/around_the_world_in_80_days_chapter_36_summary.pdfIn PDF document text
    • https://wajovojov.weebly.com/uploads/1/3/4/6/134652085/xesodowekoludoz.pdfIn PDF document text
    • https://sufidubiziden.weebly.com/uploads/1/3/4/7/134732268/gesifivetugukowalis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vilepobafomunow.atwebpages.com/wukikotefiwaxam.pdfIn PDF document text
    • http://lukugebov.rf.gd/miya_bhai_song_lyrics.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_off0000f59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59B 5008 bytes
SHA-256: b95dd7f0bde839ba99003d450fcab717833bcaf4ad03943bfba4f8e7d4c3c792
font_01_sfnt_off000106b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B7 10340 bytes
SHA-256: 248ee1d4042129df3142cde439ceb1a8482c8203bc716fac90e8da344876df14

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