Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9e737c5d9f6f44…

MALICIOUS

PDF

179.2 KB Created: 2021-03-27 22:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 77aeb0b4452ecc7ba2fe7c1a4f8382b3 SHA-1: 110ee27f4a72a8737e35373b4c68ea86823ff70e SHA-256: ec9e737c5d9f6f44885b50949c00a3038ece24f81e692f7ad25bf7260ca161f0
126 Risk Score

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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=al+quran+bangla+english+arabic+pdf+free+download PDF link annotation
    • http://sevezor.scienceontheweb.net/33653090475.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/guia_de_gramatica_ingles.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/51260354889.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/pujiruzizozit.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/jagulegakizowuzuvireg.pdfIn PDF document text
    • https://wabobileminila.weebly.com/uploads/1/3/5/4/135400898/8faabe755.pdfIn PDF document text
    • https://bitoxusimafitaj.weebly.com/uploads/1/3/4/3/134311342/53139768.pdfIn PDF document text
    • http://godaxovepule.22web.org/vogasusiram.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/rixojagiz.pdfIn PDF document text
    • https://fanuxerejupu.weebly.com/uploads/1/3/1/3/131398214/perufilinofajesine.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/75719256713.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/63814292937.pdfIn PDF document text
    • https://mijezuri.weebly.com/uploads/1/3/0/9/130969422/bifofegit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toduwez.epizy.com/dakakosarugaloboxupotoga.pdfIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/libaneduvivozuwuliruwa.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/altiplanicie_mexicana.pdfIn PDF document text
    • http://buvumitibeve.rf.gd/xitojeboxu.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/17776589693.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25077 5764 bytes
SHA-256: c9a57c24f7880732babfe162ea59bf7ee1e27218168e3959715fd2c394b909f4
font_01_sfnt_off0002640a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2640A 9584 bytes
SHA-256: 37229f4b543d503a6c6e126b16ed2f84e836f6df985ed73680328ee29d83a300
font_02_sfnt_off000281d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x281D3 19736 bytes
SHA-256: 60d49d25e6c5c76549cae14d3ad630697c4b912ebb80430ac6c3afc7b6b31274

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