Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd046db300005f0…

MALICIOUS

PDF

78.4 KB Created: 2021-09-15 12:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4332b2ffae2ad7fe4d0ecfd689244f41 SHA-1: 77de25032e73ba151ba2bd042cd9772cb71afdfb SHA-256: bfd046db300005f0d71defdbf05ab588339903686f0193b5b043a69672274236
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URIs suggest it is designed to redirect users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://dollarplus98.com/images/upload/files/sirurusebed.pdf In PDF document text
    • http://shipsupply.ru/userfiles/files/32904985711.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/kebavosugotebibeg.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/70278319836.pdfIn PDF document text
    • https://stpm-sa.com/userfiles/file/9017059109.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/vegaboline.pdfIn PDF document text
    • http://cabini.it/userfiles/files/6180453578.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/16060359030.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/58760182562.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/gilemomexezugebezewup.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/newedofemir.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/94773667119.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/c02348de69a068df6be2fef236e4d97a/99566806031.pdfIn PDF document text
    • https://mlspoland.co/files/file/nonegalaveroxesasede.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/sajodadibubogusod.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/92844138108.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/famedi.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/46704478513.pdfIn PDF document text
    • https://bak.vn/upload/files/13992380923.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/99080538447.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134152d31187---lefakeganodokuk.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/xesijinixuk.pdfIn PDF document text
    • http://rent-lease-no1.com/userfiles/file/20210904163654.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/robekene.pdfIn PDF document text
    • https://servicepapik.ro/files/wigerusijef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=harry+potter+third+book+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_off0000cdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFE 17492 bytes
SHA-256: 3040741091249641322a66ac4d71292ca5e5a482e5d1e5cbd8430d9bade94f2d
font_01_sfnt_off0000fb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB38 10616 bytes
SHA-256: 8fe5a240175320ea5875f86939e2490c8aa71ca18a5cbc04347cd89d681e0845
font_02_sfnt_off00011364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1