Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeedda59536e6630…

MALICIOUS

PDF

166.7 KB Created: 2022-06-01 23:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: b4e1ffe92339f47a6984813f63591650 SHA-1: 5860b5416805754e40c540f2974f87eeca95a697 SHA-256: aeedda59536e66304461d9385e47bbbb711276f88504f48213d97d692c34e47c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high number of embedded links pointing to various domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a spearphishing attachment designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7428

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://mifuj.co.za/XSRYdR1H?utm_term=the+mechanist+fallout+4+walkthrough+guide+pc+software+download PDF link annotation
    • http://www.bash.cl/media/file/63097439615.pdfIn PDF document text
    • http://aymsoft.net/aym_images/files/nowusife.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/68274498153.pdfIn PDF document text
    • https://daxixulo.weebly.com/uploads/1/3/1/0/131070202/dc53976657f01.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/53570574216.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/sozot.pdfIn PDF document text
    • https://zopujobige.weebly.com/uploads/1/4/1/4/141426365/59a6b6b.pdfIn PDF document text
    • http://heonlab.hu/uploads/files/pavuturovefovudoviwip.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/mujigituluj.pdfIn PDF document text
    • https://kovibokasekur.weebly.com/uploads/1/3/4/8/134880184/dixesolinurew-rokafifotag-tikugoj.pdfIn PDF document text
    • https://baduripafab.weebly.com/uploads/1/3/4/6/134623558/346033.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/99970924341.pdfIn PDF document text
    • http://jyy.jp/ckfinder/userfiles/files/20220524_020945.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/wewenonev.pdfIn PDF document text
    • https://ontozescentrum.hu/tmp/kidujewivatavezizo.pdfIn PDF document text
    • https://avenuehomes.tennisavenue.bg/files/files/85774947326.pdfIn PDF document text
    • https://xekijemot.weebly.com/uploads/1/4/1/2/141259686/kudef-depibibuwoga.pdfIn PDF document text
    • https://leluponiw.weebly.com/uploads/1/4/1/4/141484600/c541bf4d.pdfIn PDF document text
    • http://ehomerealestate.org/images/file/54991914088.pdfIn PDF document text
    • https://barufaworu.weebly.com/uploads/1/3/5/9/135957986/2539459.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/fakujujiwug.pdfIn PDF document text
    • http://cuuthuong115.com/ckeditor/kcfinder/upload/files/visobokanid.pdfIn PDF document text
    • https://glamcamp.jp/upload/files/risekojozip.pdfIn PDF document text
    • https://www.fsps.co.th/kcfinder/upload/files/35230681134.pdfIn PDF document text
    • http://laparole.net/kcfinder/upload/files/16392285295.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/40450297918.pdfIn PDF document text
    • https://bupuxikamofimap.weebly.com/uploads/1/3/4/7/134734142/3964020.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/57467277401.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/49547488965.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2022040100064673499.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/61856294472.pdfIn PDF document text
    • https://sikevitexin.weebly.com/uploads/1/3/5/3/135301450/jatedefufunozefes.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/lubopikomitima.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/48709912032.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22820 18492 bytes
SHA-256: 3cfd19359f5d0e419fb154621256993ebd4505b2acbd4848bd798dea582e0866
font_01_sfnt_off00025820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25820 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00027037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27037 11384 bytes
SHA-256: c6faf7e783be769a3e20f8a96022fdc5f81a5972a1cdf6911dcb35ed14fdc706