Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66c59d9becdc4aa…

MALICIOUS

PDF

79.8 KB Created: 2021-03-10 00:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 69e4155c0a275f7e6341c987361dc276 SHA-1: 714c19ffd9186707c683ff2195efe3cc839419a2 SHA-256: e66c59d9becdc4aa41a333ad4d5fb8e3de3e47a838f31fcd915ada35fd4c84c3
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous URLs points towards a phishing or content distribution scheme, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=will+microsoft+flight+simulator+come+to+xbox+series+x PDF link annotation
    • https://cdn.sqhk.co/pugepavofu/hNGgjdr/betomawixofafamarur.pdfIn PDF document text
    • https://gagavupotiwek.weebly.com/uploads/1/3/0/8/130813998/1929302.pdfIn PDF document text
    • http://vawubarisef.22web.org/9302400734.pdfIn PDF document text
    • https://cdn.sqhk.co/fakozunada/jfhgsMo/entrepreneur_academy_mentorbox_review.pdfIn PDF document text
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/sikita-sivugosi.pdfIn PDF document text
    • http://wumorumomu.22web.org/2015_chevy_traverse_infotainment_manual.pdfIn PDF document text
    • http://vebumugaw.22web.org/gram_panchayat_work_report_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/hefBhdZ/gbox_mall_compras_x_interneta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://moxurux.epizy.com/pupode.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/19547287111.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/gugijuzasipoworegijopixaf.pdfIn PDF document text
    • http://vodesoxiside.rf.gd/phonics_worksheets_reception_free.pdfIn PDF document text
    • http://ranuvukeguzekiz.epizy.com/79962499810.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/most_popular_social_media_platforms_uk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/mozosotejo.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/49371031135.pdfIn PDF document text
    • http://pupowupavil.epizy.com/2787197963.pdfIn PDF document text
    • http://zovaner.rf.gd/candidiase_homem.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/wow_classic_lockpicking_guide_wowhead.pdfIn PDF document text
    • http://wojobawezelo.rf.gd/30809999994.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/54926263458.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 5292 bytes
SHA-256: 8e4f3bb3f7fd24e5b7ee7d6ab7719a4ccd1e5e80e0c1081a6cd9c73ac5e50cce
font_01_sfnt_off0000ff74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF74 10536 bytes
SHA-256: 1d72c02841928210bc49f1aeaedb86eeebe0d8acbca54ff201224f652686ef5e
font_02_sfnt_off00012350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12350 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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