Malicious PDF — malware analysis report

Static analysis result for SHA-256 1853ae4df6af9ad9…

MALICIOUS

PDF

68.9 KB Created: 2021-03-26 19:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03c98313fa0364621a85918e51adeb69 SHA-1: 88405f1e4b668eb75ebdbc09b68b72fd8b48fc7b SHA-256: 1853ae4df6af9ad99d2ed70afad32d7744f34c7eea9d83a13c3f65389e9e8ef6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL is likely used to redirect the user to a phishing or malware distribution site. No scripts were extracted from this sample, but the PDF structure and embedded URI are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/award?keyword=great+is+thy+faithfulness+pdf PDF link annotation
    • https://bolowotusupiwam.weebly.com/uploads/1/3/5/3/135300352/nasep-lafomekudam-zurinem.pdfIn PDF document text
    • https://zetapowopes.weebly.com/uploads/1/3/0/8/130813904/latamog_lojapovoz_xupoturipote.pdfIn PDF document text
    • https://wiwofuda.weebly.com/uploads/1/3/2/3/132303082/giligekosuwanutu.pdfIn PDF document text
    • http://my-favshop.online/783350064631h54a.pdfIn PDF document text
    • https://kikuvutu.weebly.com/uploads/1/3/5/9/135965216/6efa8f40a7a06c.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/6300814.pdfIn PDF document text
    • https://wufewevaso.weebly.com/uploads/1/3/1/4/131453291/4685806.pdfIn PDF document text
    • http://interbank.link/767652719670g1pn.pdfIn PDF document text
    • https://tadududire.weebly.com/uploads/1/3/4/6/134687045/6670673.pdfIn PDF document text
    • https://vilamewu.weebly.com/uploads/1/3/0/7/130775649/sekosi.pdfIn PDF document text
    • https://zinalojirade.weebly.com/uploads/1/3/4/2/134266028/merepinapuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87567da9-e860-4df1-861c-76f7b8344f15/what_happened_at_the_overlook_hotel_in_the_shining.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/33482400720.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/1689417679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3ff444-038a-4f85-903e-0aa72d321a01/1939781682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a65661e-6335-4343-a2f7-241623261fd4/padefumu.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/nuferan.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/manualidades_para_decorar_amor_y_amistad.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/futusevuzidefotifovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f480ee46-cf98-428a-956b-50fde4022fce/4707257354.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/hawkes_learning_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/85658379448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9dbb0b-660b-40eb-8f12-15aaaafc13b7/rosemizomotikemulo.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CF 5260 bytes
SHA-256: b6bc1722e7ce83616560de60f9943251fe857017f723f68a32f6c8f977c7cabf
font_01_sfnt_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 10080 bytes
SHA-256: 75c84f1a76c263ed69451dc17808fcac7333833a7133086e6ee8686f84d7df53