Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdea6668a11e431f…

MALICIOUS

PDF

76.5 KB Created: 2021-09-25 10:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 127b875a156796ff767f5b56313233da SHA-1: 7b582e0efd0b99085727f7a1e850eb2434e34edf SHA-256: fdea6668a11e431f9f921392643135cba3cf6d3ba553204735dbad48ff1584fe
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous distinct domains, many of which are associated with disposable hosting. The presence of multiple unknown URLs suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/61986564034.pdf In PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/segoxilubolidi.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/lemube.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/pukovepebikosu.pdfIn PDF document text
    • http://altus.pl/userfiles/file/xelosarovilavas.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/31695718774.pdfIn PDF document text
    • http://veitali.com/upload/files/44216945371.pdfIn PDF document text
    • https://searches.onlineconvey.com/userfiles/file/97822444088.pdfIn PDF document text
    • http://rozynoklinika.lt/userfiles/file/84078164055.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614e742ed1a54---vuxukemapivufuxixulag.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/dapufonopefovase.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407a4c6066e---posatid.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/19204404435.pdfIn PDF document text
    • https://slide-bearing.com/d/files/vodunokadawif.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091910494328.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/25835353259.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/ropejudo.pdfIn PDF document text
    • http://lecostationery.com/files/file/21835433907.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210912123145390830xazk2f.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/gerum.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/51323824227.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/roxigiramitisime.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/11841996789.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/34001833516.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/25282965807.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sword+art+online+season+2+episode+1+dubPDF 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_off0000bfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CD 19820 bytes
SHA-256: 7adf3047d426dcb6ec259f39ddc04f508a3d2e170e72c01ad028db026be61f94
font_02_sfnt_off00010aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA4 10956 bytes
SHA-256: 17f4828f722f93073bf8149edfe85edd1b9ec65ee971dd55100947604268e6b7

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