Malicious PDF — malware analysis report

Static analysis result for SHA-256 2566c98039d3a435…

MALICIOUS

PDF

94.8 KB Created: 2021-06-29 04:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1e4bae83baa022cb7ae600cd3153beca SHA-1: 05b86a470111a34b1c8f283e5e78b013d1b267bb SHA-256: 2566c98039d3a4350ba798c3a49d1c566a9bf086c08696fddd9d5bd3dfba7b24
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of these links indicates a likely intent to redirect the user to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • 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.
  • 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://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/33gcrn8cuif0aoeng84ojc93o1/genewe.pdf In PDF document text
    • http://brenno-tojestto.pl/userfiles/file/nonubupakowil.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2544825668---ridubitofiwolesosoriva.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/25134187288.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/ab6621896062ba43fe487bdd8b6ca5da/xiwivelipipon.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/21670866405.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/ee4aa8a0c08dbe0705436bebda3ab612/41581497762.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/0tt9ij8kb8ilc2rs8k8vhcamn8/fabudirefutetazalot.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/9762f24ae3036a548d8e7d79f79f5290/41917481105.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/59252457385.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bddba00f6---jarebivoxudozodawajugig.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/0f363a0998d1fd83b21681946a29f118/30965830292.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/64061502818.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/4035360851.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/98564046726.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cb090260d01---tagoxedekos.pdfIn PDF document text
    • http://bakoca.hu/files/file/4133036768.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdbf3d7030---67683432579.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/cb0c11f067f356737cb8959adbe6ad76/wikulezafox.pdfIn PDF document text
    • https://dhesient.com/media/botovifezarenagefe.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/piwefafekakivibalu.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/94889845432.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a8c4909bd---xovetoxivejemudaviwoxoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=bls+course+exam+answersPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 18252 bytes
SHA-256: 44df6355e97348b54773ade8d49e160e6396aa8ebfda39128e0a749ca22657da
font_01_sfnt_off00012665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12665 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E76 16084 bytes
SHA-256: 629677e45faedee601e08dfe5d93bed8cb2cbab2933fb40e48fc5543807047de
font_03_sfnt_off000153ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153AD 10540 bytes
SHA-256: 2666d1d126bc75d06c8f5f16ae4d9658073b4a6effe6f900fa7b86a5f8861e73

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