Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e03ed121e156821…

MALICIOUS

PDF

82.1 KB Created: 2021-09-15 18:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: feee4ee772c6f666d72c3496b0bbb27c SHA-1: 35ef45890ac92f785aa823c599b24c388e1251e3 SHA-256: 9e03ed121e1568218908c36b21f735d17e2410986bac48051197b5a85544ba7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and links to compromised CMS upload storage, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://allytemp.ru/uplcv?utm_term=ludo+full+movie+download PDF link annotation
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5e9010f92---wavinelujulatiwujowate.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/db189dfbda11adc0e515d7b4e6d4b3b1/65456582786.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a3aa71a99---visubosapuzinitipipa.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/71493469511.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/bopumivil.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/78420386693.pdfIn PDF document text
    • https://zibarajabi.com/cache/fck_files/file/70000335118.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f5f65854f---sigixuzakegana.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/39339654571.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/vefinujabadozurix.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/29544813119.pdfIn PDF document text
    • https://nls.vn/upload/files/89024069947.pdfIn PDF document text
    • http://thoitranglani.com/upload/files/nepirasavew.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/nowaniwavufekivuw.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wipidalabubuvaverewono.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/26865960566.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/67978945948.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f59d5dd567---zuboxikaz.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/26162726455.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202109070422427178.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/58a97197dd42f478b3c7aff972c6eada/45240886836.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/puruxenaganagupituf.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/69181270050.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/96986354601.pdfIn PDF document text
    • 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_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 10356 bytes
SHA-256: 11415006d3ea8397d52f81f7b491101289e25bf103b3d9c5c7293744d07b07de
font_01_sfnt_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 18932 bytes
SHA-256: f04f5633e68ce571569da7c51a64188d94f23f9befb1da6280072db3ecb3a261
font_02_sfnt_off0001226d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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