Malicious PDF — malware analysis report

Static analysis result for SHA-256 145387f978507fb9…

MALICIOUS

PDF

80.9 KB Created: 2021-04-06 08:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31e964429cb4ab2d4de81441522e1f46 SHA-1: 75d0a5b55413b5e443fdf7d3480b622c595298f7 SHA-256: 145387f978507fb971a66fe016f5f473864960d7256a8f808064b19575581e2d
156 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 0.9997

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://botokaw.ru/award?keyword=audit+and+assurance+services+15th+edition+pdf PDF link annotation
    • https://rabibusapufatov.weebly.com/uploads/1/3/5/3/135301207/nuvinidofu.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/norasipanefenagefibasuka.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/fiwugomixo.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/tutorial_camtasia_studio.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/7569717.pdfIn PDF document text
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/7710815.pdfIn PDF document text
    • https://virubavu.weebly.com/uploads/1/3/4/7/134755547/bufexoratez.pdfIn PDF document text
    • https://gadetuzajuvi.weebly.com/uploads/1/3/4/8/134850054/5345306.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/jurevogozil.pdfIn PDF document text
    • https://wufodosutitivo.weebly.com/uploads/1/3/0/7/130739718/sumuravawozekim_binelafefelak_kuvus_najosokapuduso.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/11th_biology_book_free_download.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
    • https://s3.amazonaws.com/muwomapotumugi/nios_assignment_506_front_page.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_64e3965eb02c40a1b837c5fa580cfc56.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/xegigixetegoziwagag.pdfIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_fce8a4daef1242bf8b446f0da869f665.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/financial_reporting_notes_ca_final.pdfIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_9ac31f81789f4ce7864529aac3e18377.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamovagag/74989184766.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/busodajitot.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/10748178909.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D3 5320 bytes
SHA-256: 15a0244f8dbcc4d3dd2a5099d73d8c708461781b68ce41511941a931c9f43400
font_01_sfnt_off000102e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 10832 bytes
SHA-256: f3b7c2ebe688e8648863e0e05da3c70b5033ccac6623c688ff70c17362a585f5
font_02_sfnt_off000127b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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