Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba51a42a400fe06…

MALICIOUS

PDF

88.2 KB Created: 2021-08-04 23:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 52616ea47d05d612ef155a5b49c353b1 SHA-1: 2dd2173739dee95df8c433d830023a56f1400edc SHA-256: 0ba51a42a400fe06a6c9904e34ea0f69265c420b144706dcba9576a60399d56a
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, some of which are identified as potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware. The presence of a 'Download Now' lure further supports this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://parklanehotel.asia/userfiles/file/13142342897.pdf In PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/vc2t63i3ke8lnci5m6lhedhbk6/80213854678.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/sorijevamitikumovugijux.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/86630414872.pdfIn PDF document text
    • https://kopari.hu/files/file/17460039297.pdfIn PDF document text
    • http://tsmsaldature.it/userfiles/files/32950316876.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/molorevisikatoweje.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2280b4c830---5503790923.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/mupamatuvolafemogapuru.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/vusezesosaxezog.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/56fe2f0300686a1b83e29ee785e4276e/mefimu.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/93297682751.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/90543094331.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40523308d4---1448216473.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/embbf06mhi99p231qo49bqeska/mituju.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/98425756928.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/baxizi.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/1850946305.pdfIn PDF document text
    • https://dafelia.com/files/26164623531.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/99123838905.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/ca422e4dc3f26bbe4eceff99bedfdc14/gawidojiwikigugubujibuxid.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/2ea218f5f44e05f3fad57032b699ba24/43695511444.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/61363361885.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/mevoma.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=tntet+child+development+and+pedagogy+study+material+in+english+pdfPDF 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_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 11312 bytes
SHA-256: c47656ab9de40eb6863a0705dcbaf08edf27939140f364426737d4ac3acea784
font_01_sfnt_off000108b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 17640 bytes
SHA-256: 055820a712ba929c33452ad940a6c7ab9627124196a056263f8f14175293753b
font_02_sfnt_off000136d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1