Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38e0002e81f2c30…

MALICIOUS

PDF

86.8 KB Created: 2021-09-08 12:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: cfbf28c7cc6d501d51c19c4a4c0afaf0 SHA-1: 042f24140fedddbdea73f209ded32bdaf88183ba SHA-256: e38e0002e81f2c300e89853a01dca46d659251404ed9df91949fa1f9fce37d4c
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 high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external URLs, some hosted on compromised CMS platforms. The primary goal appears to be directing users to potentially malicious or phishing content through these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://studioambienteterritorio.it/userfiles/files/6243474743.pdf In PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/peresabuzori.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/66083215686.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/13605273960.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/3d5cc6c893390f39f3a89282b2603d15/pexib.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/zipelujatetajojugepebas.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/vorel.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/bj2l9f8sck1754i27njkuo50s3/lodonerum.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/piveruwifimulizedap.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/marixam.pdfIn PDF document text
    • http://wirheiraten.de/images/file/2724934666.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/93556160303.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/36798618446.pdfIn PDF document text
    • https://luatkhangthai.vn/upload/fck/file/87061340497.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/30720582114.pdfIn PDF document text
    • http://www.veslovani-vsb.cz/soubory/file/33126125508.pdfIn PDF document text
    • http://grandfiltr.com/files/file/93959317201.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/1534402926.pdfIn PDF document text
    • http://sgpeo.pl/users/file/kijoxikebov.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376d0663491---9853402554.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/90225728346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=all+sun+em830+multimeter+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_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 18704 bytes
SHA-256: 450d527fe39b23eb4e1841e2a2f44d09ed6055c93482392fdc5da4d4b725e6ec
font_01_sfnt_off00011cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB7 10732 bytes
SHA-256: 189fe7fe057093852d2fa2b35380b3de9a878b0e485520a27535d3259cc5871a
font_02_sfnt_off00013573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1