Malicious PDF — malware analysis report

Static analysis result for SHA-256 974fe1a87c545122…

MALICIOUS

PDF

96.5 KB Created: 2021-08-01 05:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ece47860b7ff83d3a078b820e47d138c SHA-1: d3de2f4a1ef42a19e4a615af4fe01ac3318479a5 SHA-256: 974fe1a87c5451222810f4ddb8691da5b4854fe72ca7ddbd5cbb291d86ab2aca
172 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish for credentials. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a tactic to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/9i9fl96uf7dfuue7gpkubmcl2j/kulalokakuviponovun.pdf In PDF document text
    • http://growlink.biz/userfiles/file/talusatatuzolewarezadowol.pdfIn PDF document text
    • http://benly-carson.com/product/files/23727254776.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/af0ec4a9e95b36c8b60ace361655b314/rokibotuxamazobiwobonu.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/56761109520.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/tofetekirirexesedeweno.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/lotisiti.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/6f3a0230b7d47f6c237410b716281be7/tukerod.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075996fe1ccf---27648670168.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/1038470161.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/jebazajutegosazila.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/12181950600.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d3cd1832557---jutovibesunozifiw.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/beruxometut.pdfIn PDF document text
    • http://englishplanet.info/ckfinder/userfiles/files/zajomukiruxe.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a140c55d6---rolobimanoxepifaw.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/zozunapetute.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/rexabogage.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/a223a78ca05cc22a8ba3fa9a7dd93709/zitavabaratamevewisana.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/sunoxumetefuveza.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/82713763693.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=hau+bsc+agriculture+entrance+exam+question+papers+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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11146 17628 bytes
SHA-256: bbb79eea777a478e593bacd9fd01a34abbcdacdb5529c1b2adefd074dfdd9f65
font_01_sfnt_off00014011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14011 11444 bytes
SHA-256: 85490739da2d383a9bcb231df2d8f97ea1ea9d5144a9b73f3d8f1ce6cfb5eae5
font_02_sfnt_off00015a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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