Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e12045465a553af…

MALICIOUS

PDF

86.1 KB Created: 2021-09-11 03:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: af1672a3cd29a4f467c0f4c9d44a364b SHA-1: 309ca4491ca306a5cda6ead0384e7b87fee4ada5 SHA-256: 9e12045465a553af887ec73d3f7e1f93900f53feb158ef41012b467e627a8319
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://lorofilmes.com/Uploads/ckfinder/userfiles/files/59486509913.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161330bd148a25---37995176595.pdfIn PDF document text
    • http://vongtaygiay.net/media/ftp/file/19029093004.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/napukemesu.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/92230489143.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/62843600319.pdfIn PDF document text
    • https://suncables.co/images/file/59039721466.pdfIn PDF document text
    • http://katachizu.com/img/news/files/kikadokitonuvi.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-8/20210908072141684753.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/53963129294.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/doregejalosobut.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/19007011742.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/42551275838.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/nezifavifibuwabejadisogen.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/1282188654.pdfIn PDF document text
    • http://talesma.com/E/file/xilik.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/zofusileruv.pdfIn PDF document text
    • http://we-women.de/default/files/uploads/file/86013825806.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/5096400142.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/27918773761.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/85105794121.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/rasupezajupomesojukifa.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/88849343007.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/56445244500.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/94915737854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=best+location+changer+app+for+androidPDF link annotation
    • 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_off0000eb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 17592 bytes
SHA-256: 6225584cc9d72367fe7714345a90050d72d68cbbacae46473fa8eadd9fefb4be
font_01_sfnt_off0001190a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 10952 bytes
SHA-256: 5a4382ed8dbf851869055a3396ae270b71d3eb7f82047a3446ceb596dcb8335a
font_02_sfnt_off00013225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13225 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1