Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee38949fb8db209c…

MALICIOUS

PDF

87.6 KB Created: 2021-07-19 08:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 45f27ed7b0498d1a537f2b9b9f56a4ca SHA-1: a444f1a5f5ddf803c9bafe11a1e842b354953b33 SHA-256: ee38949fb8db209c5205fee18518418caff2f19a618aa1aa82a5981064177d85
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple domains, some of which are hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://sghscsjamarai.org/guruhargobind/userfiles/file/57179267160.pdf In PDF document text
    • http://architettogherardi.eu/userfiles/files/83021424533.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecab8a0222---97941157695.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/vomikupemedikew.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/5168490824.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210704132358101502bvpmavddaghm.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073875cc5064---3933225789.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a5db7a874---vupedaxut.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/56887807604.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e2690302a---bebijegubofudizu.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160992dae12893---kutibuwuwowile.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b415556b50---vogopedijikanuliresolara.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983d584a8d6---jixeruvujoguve.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072098e66cb9---nalupezexumagonixisotox.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/lexipibofuv.pdfIn PDF document text
    • https://actorconseil.com/files/file/99045727921.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/tudifuxariv.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0b75da498---dinubuvasefadigalusulun.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/jiriferivoxadopokoviv.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/4723864066.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f35c5c88aa---64759203062.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/57290402677.pdfIn PDF document text
    • http://cjatkinson.com/userimages/ratuwozulimazitenakavi.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609143d552746---fededazumerasuwosebereze.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/sezefumitelakarot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=which+color+of+light+has+the+longest+wavelengthPDF 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_off0000f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 18208 bytes
SHA-256: 6422e8b45de0107b1f21ded37de0f6cf98d93e464449b8e8a4aef3617674b120
font_01_sfnt_off00012002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12002 10760 bytes
SHA-256: 897c01a6e50a70e3d29846012b5dcf6e1c06f47e9552df35ef9e24a7cda6a433
font_02_sfnt_off000138cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1