Malicious PDF — malware analysis report

Static analysis result for SHA-256 395e1ea058160fe2…

MALICIOUS

PDF

80.2 KB Created: 2021-03-22 02:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 362c368030c15d9677671b3dae386ede SHA-1: 9fe482341288de86c510b400c86c3040dc84ac77 SHA-256: 395e1ea058160fe2028498dcd6e70f5f110c24c2c9e6110e24f67bbfd0964e6c
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites, likely for phishing or to download further payloads.

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 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://resalured.ru/wix?keyword=medical+abbreviations+practice+worksheet PDF link annotation
    • https://vekadewozume.weebly.com/uploads/1/3/0/9/130969331/5813904.pdfIn PDF document text
    • https://xevuripef.weebly.com/uploads/1/3/4/0/134098507/tosasawetojobu.pdfIn PDF document text
    • http://wimudevereru.sportsontheweb.net/pdf_to_word_program.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/ignou_bsc_syllabus_2020.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/dilosuzekexivifu.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/what_does_frankenstein_represent.pdfIn PDF document text
    • http://genoray.pro/365786485888h6p0.pdfIn PDF document text
    • http://egrn-order.online/rca_dvd_home_theater_system_rtd317w_manuale4whc.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/jemefowitufas.pdfIn PDF document text
    • https://tijoteveduno.weebly.com/uploads/1/3/4/8/134853829/3662637.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/2471649.pdfIn PDF document text
    • https://fijuvosezo.weebly.com/uploads/1/3/4/0/134096395/1926979.pdfIn PDF document text
    • http://akb54.ru/catholic_read_the_bible_in_a_year_app83vwf.pdfIn PDF document text
    • http://merokomazojewi.scienceontheweb.net/a_walk_in_the_woods_full_book.pdfIn PDF document text
    • http://kawlites.online/regakezodenogevevuzzlc9h.pdfIn PDF document text
    • http://pogekoxuw.mygamesonline.org/segisonako.pdfIn PDF document text
    • https://lumekagaxegi.weebly.com/uploads/1/3/2/7/132712489/e6ea7.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/499233d8-da67-43f6-b7cf-33ad96a642ce/mikuni_carb_rebuild_service_uk.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/jj_benitez_caballo_de_troya_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f048a3d-7f96-4042-96c3-5dc99667e311/satabaxivirikinax.pdfIn PDF document text
    • http://vifidumefitur.atwebpages.com/36805732228.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_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 5524 bytes
SHA-256: fe06b169799b82eb80bbf655388ab080d3bf737296ec18b25ccae31785ed397e
font_01_sfnt_off00010d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4B 11336 bytes
SHA-256: 7d7a265d4fac28e564fb385f430ca20ddcd2ee0af57e0993ac4426a860405653

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