Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f08dbe3efd5569…

MALICIOUS

PDF

78.3 KB Created: 2021-03-24 23:02:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 93cb2de31833884db62f8e53ca6a2711 SHA-1: 9a42a8d7822b7d566c6a606d9df2aba0c93b6bf9 SHA-256: 17f08dbe3efd55695601c6c1dec3efbb99886b8c07638efdcdb685a5718095a9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://fokemale.ru/award?keyword=algebra+worksheets+year+8+pdf PDF link annotation
    • http://opencabinets.xyz/sharing_video_facebook_messengerg7jd9.pdfIn PDF document text
    • http://devuweza.scienceontheweb.net/49343857280.pdfIn PDF document text
    • http://kotowis.22web.org/2000_polaris_xplorer_400_top_speed.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/7852472471add.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/phrasal_verbs_spanishdict.pdfIn PDF document text
    • http://my-favshoph.online/comment_lier_plusieurs_ensembleghbaz.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/8177877.pdfIn PDF document text
    • https://zawuziwoju.weebly.com/uploads/1/3/1/6/131636930/8ad8bcacbd33.pdfIn PDF document text
    • https://ganusanawopat.weebly.com/uploads/1/3/4/4/134488834/379cc4e199f.pdfIn PDF document text
    • https://pogiwaxo.weebly.com/uploads/1/3/5/3/135312355/kinodegule.pdfIn PDF document text
    • http://help-violation.com/what_is_the_weight_of_sony_55_inch_tvxa6xj.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/63395755787.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/895985f1-1afa-4254-a763-d67561ff667a/crossfit_open_training_program.pdfIn PDF document text
    • http://vufositediv.epizy.com/mokexixajam.pdfIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_d7906795d2854c8ea3f44ed6cdafe93e.pdf?index=trueIn PDF document text
    • http://gigitepusiligo.epizy.com/pdf_to_word_converter_premium_apk.pdfIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_d68051624576449ca84979feec10045b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cc81b5e-4e2c-4c1b-8d4a-7bfc387a34b5/gozinefus.pdfIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_dfd78ff1fe364101a7b70877ccaddc78.pdf?index=trueIn PDF document text
    • http://kiwusumusi.rf.gd/vejisasasilukomod.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_620b74e6c750406baade88fdd1abda76.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28710a3b-dda1-49cf-85c4-caf76e2efd49/orbit_irrigation_controller_nz.pdfIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_15ffa4336f54424280c48b7b3d7e8964.pdf?index=trueIn PDF document text
    • http://nidawumatori.rf.gd/95908546479.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_off0000f367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 5884 bytes
SHA-256: 4c0fb016b6d101e34fdfcb65d5960a07860da2139fc4e2dcf3d8d6aa3a383bda
font_01_sfnt_off00010780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 10472 bytes
SHA-256: 1fdaa5e89a80e618ad6e16daece2117f20caf146b22cd0c7cb38e9411aae6d52