Malicious PDF — malware analysis report

Static analysis result for SHA-256 7969e9ab707d00cf…

MALICIOUS

PDF

78.6 KB Created: 2021-09-06 03:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a24208f20358e2178f2263d44eb57a40 SHA-1: 03138e55a28ade2de3f9ede6a9130c1784c83d61 SHA-256: 7969e9ab707d00cf9ed0a1829326173455a917c4e646d178e87cb6e2d715fdb5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on these numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://himalayakebab.com/shipinc/userfiles/files/tazamesiwofunokiwa.pdf In PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/77873321a6bb708c50b25916ea6c541b/84036943675.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/88423494397.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a8d7bf254---32705614555.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945fea16bfe---22389532549.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/14304163161.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/e2b6e0170626c0ecce9ddfd37b0eeb06/zaxusekesadisojemodunirof.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/82904426976.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfc01bafc5---nulilukajulile.pdfIn PDF document text
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/18671573792.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/kegimogebabibununezev.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/d00eb1c852d7ff802ae6f83aabd513ef/fuvema.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/vibitiranakoduj.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/13129256055.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/tqf6q9ek1f2bbj1k63536mcb26/rozokopavafogemed.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39258df79---vunipasodajovipizuxeliseg.pdfIn PDF document text
    • http://consade.com/userfiles/file/jikubutavogalurizajama.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/2116186488.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/dipebagosupu.pdfIn PDF document text
    • https://doctorchina168.com/upload/files/jaxekujifezefatuximuba.pdfIn PDF document text
    • http://bangtaisay.com/uploads/userfiles/file/513169512.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e57220ad2b---nipezasozimidutazujes.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/pufop.pdfIn PDF document text
    • https://vestol.bg/files/file/majunamubokutaxuwibujodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=kensington+pro+fit+mid-size+wireless+mouse+manualPDF 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_off0000cc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 17616 bytes
SHA-256: 49bcac1e9a1931c93c0db52d902363ace0ec0cd557c1ab5eaa22312fb76e2dc4
font_01_sfnt_off0000f9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 11112 bytes
SHA-256: bde59edb8b49d732c11f9a2d64bbfd658e12dc506b9a3fbd590d2f0194fbb503
font_02_sfnt_off000113bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1