Malicious PDF — malware analysis report

Static analysis result for SHA-256 4650eafcde7d4b07…

MALICIOUS

PDF

84.6 KB Created: 2021-09-03 02:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48e78c75d3d54d7aa184c0d38b5842c1 SHA-1: d0f2bf5cb3169887ddd74a4a29b36e7495d6dbb6 SHA-256: 4650eafcde7d4b077bb4d06e11e4f1679fff79cfc278b024a6b6f2e931e44eb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that exhibits characteristics of a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external 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://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xajalavureru.pdf In PDF document text
    • http://quadocdao.vn/uploads/files/tevikesidasarepur.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/84414977e1c541bbb338364c4df0b0f5/bajuwo.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608343a6772b6---jepaxubesawatalubidusoge.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210505002653.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/34927458417.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210606153538.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d4cc89bfd---gugepavemikotoz.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/kajorimedekigex.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7504dc824---mitopamiwuxisob.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/73518796865.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/92416986073.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/jarawafub.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c5c77b4d4---rovefukowulozas.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ccd0540463f2e3bdf81703f697b1e4cf/naguxapunofumoxe.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dd18809a7---99805112759.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f857bacb8d8---penakadalita.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/ruzemajusenijupuxonenuz.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/dedawedezaninegavivitura.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608303ad6eda2---31807373127.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/95865052947.pdfIn PDF document text
    • https://tmtteks.com/files/42901855698.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/sokumekelumijivizimov.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/58231822053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=agrippina+libretto+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 19464 bytes
SHA-256: 05efbd3e61a320c5096bcbbb03d0bbfde167a99bf7772a209eeb29a68a8024a5
font_02_sfnt_off00012b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B28 10628 bytes
SHA-256: b87ec88a01011f5babbcc3baec37493d0c26bc11558b16d202a6fdea8096b131

Open this report in the interactive analyzer, or submit your own file for analysis.