Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a1fc8ce088a4f2…

MALICIOUS

PDF

81.5 KB Created: 2021-03-18 15:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c225055c394f2b19148a13b53c419eaa SHA-1: 53c0af8c91646a0c752a478740a6370ae7b29d99 SHA-256: 90a1fc8ce088a4f2b54a552452631e63c3d289bb32dfd44e66f12cf0b4653fd6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://mezovuduw.ru/award?keyword=historia+del+bienestar+laboral+pdf PDF link annotation
    • https://pemimitajeli.weebly.com/uploads/1/3/0/7/130739011/kizarupo_zexopim_nofubitisali_vujetogi.pdfIn PDF document text
    • https://cdn.sqhk.co/vapumojemov/Gifibjg/code_snack_simulator_roblox.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/de61ba2.pdfIn PDF document text
    • http://vagoneviwesum.66ghz.com/que_significa_soar_vestida_de_uniforme_escolar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_604ccc1898da8.pdfIn PDF document text
    • http://jobatuzuru.22web.org/41891315712.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/vafafaxorudonaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_6046dd4a1b0e0.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvomafoda/pIqcjaL/wuzuvasutegabasimixebabo.pdfIn PDF document text
    • http://zerudomafiko.iblogger.org/star_wars_ahsoka_lightsaber.pdfIn PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/xixifakodojejawepa.pdfIn PDF document text
    • http://nogolasuber.22web.org/angularjs_interview_questions_and_answers_for_2_years_experience.pdfIn PDF document text
    • http://pifumufupes.iblogger.org/socialismo_y_comunismo_marta_harnecker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_6048523c4d603.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaforapibasaw.epizy.com/44771830389.pdfIn PDF document text
    • http://parolodase.epizy.com/paint.net_download_deutsch_windows_7.pdfIn PDF document text
    • http://finuzajobozosom.epizy.com/ramadan_calendar_2018_pakistan.pdfIn PDF document text
    • http://kirigawegugava.epizy.com/70322615629.pdfIn PDF document text
    • https://108bb973-5399-4bf7-a70e-a18780752cac.filesusr.com/ugd/760a88_bcbea084ab504c2792830a6d8c70aed5.pdf?index=trueIn PDF document text
    • https://877305ac-a74e-4e93-918f-f866ec7622df.filesusr.com/ugd/0dac30_14e1b52a81af4ec093c0dd501e88818d.pdf?index=trueIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_8fcebf15eaf645aaa1e292a635125760.pdf?index=trueIn PDF document text
    • http://sizuzupapefapo.epizy.com/rivimem.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_off0000ff99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF99 5136 bytes
SHA-256: 5a820499f1b82ad7e44109f803d2b54a23388be401fed8d24ef809386aff0ae8
font_01_sfnt_off00011114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11114 11548 bytes
SHA-256: 04fc64fcaf282ce96ae1e943f93d400bac956bd2e93752eaab58173522235df8

Open this report in the interactive analyzer, or submit your own file for analysis.