Malicious PDF — malware analysis report

Static analysis result for SHA-256 918f4407793d8bd8…

MALICIOUS

PDF

96.5 KB Created: 2021-09-04 11:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 38c6c5fdbb740dd6eea6ee22283ac19d SHA-1: 75b5cea5aeb89d3de7adb9b60057d6b4a224969d SHA-256: 918f4407793d8bd8dec7233277f53804925283273a58da3252b8bba060528a28
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 critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://longarmacademy.net/fckeditor/userfiles/file/gidojipebanitu.pdf In PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d273d02f9ca06eba9752e88714843a42/82969751336.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e52469af88b---51906551286.pdfIn PDF document text
    • http://beiks.info/public/file/44867308620.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210601122533.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/846dcc60baf732897d731c8f2dcfea78/11220077136.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/pisetimazupiv.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/a19507fcb776fd07a43c4fe357e4a20a/88332831566.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/legizibovan.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/fedawovoxamasazigi.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf464676c---fupemulijed.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/wevuziwuzuxikozatekajifa.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082849ebabca---60228363819.pdfIn PDF document text
    • https://tecnicamistasnc.it/file/werugurarusibezibi.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/a120027d7779636f16ffc0f1cd0dc46b/87126268307.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608a34c2977e7---gijoseduxopepiru.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/vtl3r97gd7v81199a9l79h5345/jurafexedivimotarej.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/novawogowofawa.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/kezoberotidenaro.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/powajegumamo.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/simizaxenaso.pdfIn PDF document text
    • http://bipaf.org/2009_home/upload/editor/file/fibubevogusaparixutabal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=political+anthropology+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_off0001154c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154C 18260 bytes
SHA-256: 5891afd4d0b8ccafb3f49e0dba896063e21996de6536b7b6dd1ab2868b40aec2
font_01_sfnt_off00014424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14424 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C3B 10712 bytes
SHA-256: 368aa37364ad9eeb18d3488dc9ceffe438029e9311fad96b56da2eb6c6c41bec

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