Malicious PDF — malware analysis report

Static analysis result for SHA-256 a297a91c4c26b701…

MALICIOUS

PDF

85.9 KB Created: 2021-09-10 10:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9d57ebf3db0067a27542282c67ea6418 SHA-1: 6d8efc68e4ea401f02530cc905a11afa2366f635 SHA-256: a297a91c4c26b7019f40a6bf06d1c1c0189ffdddc53c9f2c5d0aa5ee305a71e0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://mygoaltv.org/ipp/images/uploads/files/murizuxijemaxog.pdf In PDF document text
    • http://studio70.eu/userfiles/files/kazajafojudira.pdfIn PDF document text
    • https://profm.hu/files/file/gideviwiponomewox.pdfIn PDF document text
    • https://limadelimon.com/images/file/lujoxapinoduronopurak.pdfIn PDF document text
    • http://teresachild.com/upload/files/66484962861.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/5873932457.pdfIn PDF document text
    • https://eol.org.pe/ckfinder/userfiles/files/kimosanilomiwemumeno.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/89742575705.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/18927444402.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/50825916636.pdfIn PDF document text
    • http://oembag.com/uploads/files/202109091233553576.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/60164560947.pdfIn PDF document text
    • http://yanartextil.com/firma/files/palasunisegijo.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/kuxerawelapifu.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/81751579233.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/pukow.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/48073496689.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/xisivitamox.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/kemiwavuguzupaj.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/zozew.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/11513518965.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/77054051592.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/rexulidoxeziruvamijowufo.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e0ba7ef8a7cff78de81de5e120e099b/55690645971.pdfIn PDF document text
    • http://puisan.ru/uploads/file/43044798511.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/9232b8850cc688b5669a4850d856f46f/97446722171.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=cinema+movie+app+firestickPDF 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_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 18304 bytes
SHA-256: 6874b932309c7add070014bd06ccf068f26175314d716f1f0d863b692931603d
font_01_sfnt_off0001192f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192F 10784 bytes
SHA-256: e16bab1113c6ff63698e579004a20d1fe8f5cbcf8c6be3a547f70d8f50090361
font_02_sfnt_off0001321c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1